Question: when did the first wave of western settlement began
[{'answer': 'early 15th century'}, {'provenance': [{'wikipedia_id': '7080454', 'title': 'First wave of European colonization', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 474, 'bleu_score': 0.660897735483683, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9491955752960641373}, 'section': 'Section::::Abstract.'}]}]