Question: when did the ethiopian and eritrean war start
[{'answer': 'May 1998 --', 'provenance': [{'wikipedia_id': '1781189', 'title': 'Eritrean–Ethiopian War', 'start_paragraph_id': 1, 'start_character': 117, 'end_paragraph_id': 1, 'end_character': 125, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]