Hi! This is an interesting problem. How long are the dependencies that you need to be tracking? Is it mostly within the same sentence or paragraph, or do you need to capture relationships across the whole document? And do you expect much ambiguity?
I wonder if you could do something like this: first, label all months and years, so you have them unambiguously. You can probably set this up as a semi-automated manual task with a set of rules that pre-highlights the spans, so you only have to do minimal manual labelling.
Next, you could set up a
choice task that steps through all year spans, gets the closest month spans as options and lets you select the one(s) that the year is attached to. If you have the tokens and maybe the sentence boundaries, you can use that to display just enough of a context window around the years and months referenced in the question. For example, one task could look like this:
John was born in July 1980, Peter in December. Ada was born in March 1995.
[ ] July
[ ] December
[ ] March
You could experiment with different highlighting styles for the question – maybe different colours for
MONTH, and then only include a span for the year that the question is about.