Question: what are the three main parts of most web pages
[{'answer': 'style sheets', 'provenance': [{'wikipedia_id': '21076839', 'title': 'Web page', 'start_paragraph_id': 2, 'start_character': 369, 'end_paragraph_id': 2, 'end_character': 381, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'scripts', 'provenance': [{'wikipedia_id': '21076839', 'title': 'Web page', 'start_paragraph_id': 2, 'start_character': 383, 'end_paragraph_id': 2, 'end_character': 390, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'images', 'provenance': [{'wikipedia_id': '21076839', 'title': 'Web page', 'start_paragraph_id': 2, 'start_character': 396, 'end_paragraph_id': 2, 'end_character': 402, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]