Is your feature request related to a problem? Please describe.
As far as I understand, a candidate does not allow NULL mention.
In reality, there are cases that some mention could be NULL.
Regarding the US president information extraction from Wikipedia, Let's assume we want to extract the spouse's name in addition to the president's name and place of birth.
name
place of birth
spouse's name
Barack Obama
Hawaii
Michelle Robinson
James Buchanan
Pennsylvania
James Buchanan had no spouse in his life, so the corresponding cell should be left NULL.
But, the current implementation of Fonduer does not allow a NULL mention.
Description of the solution you'd like
Allow NULL mention in a candidate.
Description of the alternatives you've considered
A mention of "" (empty string) could be an alternative.
Additional context
Add any other context or screenshots about the feature request here.
Description of the feature request
Is your feature request related to a problem? Please describe.
As far as I understand, a candidate does not allow NULL mention. In reality, there are cases that some mention could be NULL. Regarding the US president information extraction from Wikipedia, Let's assume we want to extract the spouse's name in addition to the president's name and place of birth.
James Buchanan had no spouse in his life, so the corresponding cell should be left NULL. But, the current implementation of Fonduer does not allow a NULL mention.
Description of the solution you'd like
Allow NULL mention in a candidate.
Description of the alternatives you've considered
A mention of "" (empty string) could be an alternative.
Additional context
Add any other context or screenshots about the feature request here.