Convert stance detection datasets to examples

[cczarnuch]

Todo

Take top three of the above datasets and convert them to a list of:

guid: int or str
text_a: str
text_b: str
label: int or str

[dufaultc]

Here is the FNC dataset, load it as a csv file. fnc.txt

I have removed examples from the original dataset where labels were not either 'disagree' or 'agree'