new method in def_classes to get council and date, check_discussion now works with corrected meta data

renku run --isolation python src/python/extractMPs.py data/politicians/Ratsmitglieder_1848_DE_corr.xlsx data/politicians/MPs_additionalInfo.csv data/politicians/MPs_after1890.csv data/politicians/lastnames/

Merge branch 'name-disambiguation' of renkulab.io:luis.salamanca/democrasci_preprocwp1 into name-disambiguation