Question: when did holland become involved in world war 2
[{'answer': '10 May 1940', 'provenance': [{'wikipedia_id': '637072', 'title': 'Netherlands in World War II', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '15 May 1940', 'provenance': [{'wikipedia_id': '637072', 'title': 'Netherlands in World War II', 'start_paragraph_id': 1, 'start_character': 132, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'with its invasion by Nazi Germany on 10 May 1940'}, {'provenance': [{'wikipedia_id': '1393850', 'title': 'World War II by country', 'section': 'Section::::Impact by country.:Netherlands.\n', 'start_paragraph_id': 398, 'end_paragraph_id': 398, 'meta': {'evidence_span': ['In May 1940, the Netherlands was invaded after fierce resistance against the Nazis.', 'Like the Belgians, the [[Netherlands]] declared neutrality in 1939. In May 1940']}}]}, {'provenance': [{'wikipedia_id': '637072', 'title': 'Netherlands in World War II', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['15 May 1940', 'Despite being neutral, the Netherlands in World War II was invaded by Nazi Germany on 10 May 1940, under orders of Adolf Hitler. On 15 May 1940']}}]}]