This project is simple and quick to do, but it is challenging in the the sense that it potentially requires you to read through articles that could be in English, French, Italian or German! Note you don't need to be so proficient that you can do a translation of the text, just be able to work out if any radiocarbon dates are mentioned. The report asks you to look through fieldwork reports about archaeological projects in Spain. Often you don't need to read through the whole report, just search for keywords, but the full text is there if you are interested. Radiocarbon dates are sometimes taken as part of archaeological fieldwork, but have as yet not been gathered systematically from these reports. The tasks for this crowd-sourcing project can be completed on a desktop computer or laptop (but not on a tablet or phone). You can use any web browser, although we recommend Firefox for the best report-searching functions. For any given task, you will be presented with a multi-page fieldwork report. Scroll or search through it until you find mention of a radiocarbon date. We are looking for the following information for each date (if available):

You will see that we wish you to fill in information about any dates in the spreadsheet columns provided below the report link. Brief remarks on the intended role of each column are provided below:

1. LabCode: This is the code assigned by the radiocarbon laboratory. For example, for the first date in the example image below your could write "SUERC-16897 (GU-16061)".
2. AgeBP: This is probably the tricky bit. We are looking for the 'uncalibrated' date if possible, seomtimes call the ' C14 Age BP' (BP is before present) of the 'conventional age' or the 'uncalibrated age'. The date is often followed by a "±" symbol and then a measure of its accuracy or error (see below). For the first date in the example image below, the AgeBP would be "915". Sometimes a 'calibrated' date or dates are mentioned (often expressed as a range BC/AD). You can put these in the Comments column, but please look for an uncalibrated date (which should be present most of the time) to place in the AgeBP column (or otherwise leave the column blank)./li>
3. Error: This is the instrument error associated with the uncalibrated radiocarbon measurment, usually express immediately after a ± symbol. For example in the first date in the example below, you might write "35".
4. dC13: This is a common extra measurement used to correct the sample for different fractions of different carbon isotopes. It is often referred to as "δ13C and in ‰ units". Please simply put the decimal number, not any unit symbols etc. So for example, for the first date in the image below, you would put "-22.2" in the dC13 column.
5. Material: It is importnat to know what kind of sample the measurement was taken on (charcoal, bone etc.) and if avaialble the species (e.g. oak). Please check and see if you can find mention of this in the text (and translate the term into english if you can).

You will see that we wish you to fill in information about any dates in the spreadhseet columns provided below the report. Brief remarks on the intended role of each column are provided below:

1. Material: Please enter the material the sample was taken on. For example this is often "bone" or "charcoal" or "grain". Please also put any informaiton about the species, for example "wheat","human" or "oak". Always retain the original wording: if the species is "Hordeum" which refers to barley (as in the example below), please write "Hordeum". If it is says "barley", write "barley". Try to separate material and species by a colon, so for example "grain: Hordeum".
2. SiteName: Please give the name of the site here, complete with country name (hint: of the site name is in th title of the report)
3. SiteContext: This is for anything relating to the feature on a site from which the sample was taken (e.g. "outer ring ditch", "pit 236" or, in the example below, "context 4/5")
4. Comments: You make your own remarks here if you like and/or add further information about a particular date you think is useful. For example, sometimes the type of bone (e.g. radius, ulna) will be mentioned, or a field sample number or the site's geographic coordinates if published in the article.

Just a few more tips before you start:

1. KeyPoint: We don't want to you to read through everything laboriously. Just look for radiocarbon dates. For example, with the Firefox browser and some others, click on the pdf page then type CTRL-F (or CMD-F on a Mac). This will bring up a search function. Search for keywords such as "radiocarbon", "radiocarbone", "radiocarbono" or "±" (the plus-minus symbol often associated with dates). If you find no dates, then simply submit a blank spreadsheet.
2. Often the dates in the article are not as nicely tabulated as in the previous example image, but instead they are just mentioned in the main text. In such cases, just do your best to add whatever information about the date that you can find in the text.
3. If for one of the columns in your spreadsheet you cannot find information (e.g. if no mention is made of dC13 values), then just leave that column blank in what you submit.
4. You can add or remove rows from the spreadsheet by right-clicking in an empty cell fo the table. (or on a Mac computer, holding the ctrl-button and clicking).