Correct behavior of import to not waste space #57
Description
The current implementation of import from KGReasosoning uses double the amount of embeddings for the relations because it does not properly deal with the inverse relations which are used in imported data.
This issue is isolated to the import_.py file. To fix it, first them mappers need to be fixed. Then, while converting the queries, care must be taken such that the shift in indices is taken into account.