Question: what is reapportionment and when does it take place
[{'answer': 'following each decennial census', 'provenance': [{'wikipedia_id': '3191896', 'title': 'Apportionment (politics)', 'start_paragraph_id': 71, 'start_character': 91, 'end_paragraph_id': 71, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Apportionment by country.:United States.:House.\n'}]}, {'answer': 'require states to redistrict based on each census'}, {'answer': "census changes the state 's number of Representatives"}, {'provenance': [{'wikipedia_id': '3191896', 'title': 'Apportionment (politics)', 'start_paragraph_id': 71, 'start_character': 0, 'end_paragraph_id': 71, 'end_character': 343, 'bleu_score': 0.8991220387954041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10752235256324678623}, 'section': 'Section::::Apportionment by country.:United States.:House.\n'}]}]