No title for the forth column in 'GERBIL Experiment' page

Hi guys,

Have a look at this http://gerbil-qa.aksw.org/gerbil/experiment?id=201805230002 . The forth column has no label which makes it hard to understand what it is. I think it is the sub-experiment as explain in https://github.com/dice-group/gerbil/wiki/Question-Answering.

Cheers,
Hamid

Open the GERBIL Experiment page at the linked URL and compare its fourth column with the Question Answering wiki description. Identify the missing column label, add wording that makes the sub-experiment meaning clear, and verify the label appears on the page.

Written by the indexing model from the issue text.