Question: when was the ten pound pom scheme introduced
[{'answer': '1945', 'provenance': [{'wikipedia_id': '4408965', 'title': 'Ten Pound Poms', 'start_paragraph_id': 1, 'start_character': 272, 'end_paragraph_id': 1, 'end_character': 276, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4408965', 'title': 'Ten Pound Poms', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 351, 'bleu_score': 0.8786307771674821, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15205398994304867996}, 'section': 'Section::::Abstract.'}]}]