Question: where was the u.s.s maine when it exploded in 1898
[{'answer': 'Havana Harbor', 'provenance': [{'wikipedia_id': '189610', 'title': 'USS Maine (ACR-1)', 'start_paragraph_id': 1, 'start_character': 63, 'end_paragraph_id': 1, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Havana Harbor , Havana , Cuba'}, {'provenance': [{'wikipedia_id': '38883282', 'title': 'James Henry Carpenter', 'section': 'Section::::Carpenter Steel Company.\n', 'start_paragraph_id': 25, 'end_paragraph_id': 25, 'meta': {'evidence_span': ['Havana Harbor', 'When exploded in Havana Harbor, Cuba, on February 15, 1898, "Remember the Maine!" became a rallying cry and the pace at Carpenter Steel became frantic as the demand for the new projectiles increased. Carpenter borrowed money against the', 'the first modern United States battleship, was commissioned on November 20, 1895, and was considered a test bed for future battleships. This class of ship did not use Carpenters steel, but Harvey armor, in which only the facing of the steel plates was hardened. The belt armor plates on "Indiana" were at most eighteen inches thick, and most plates were far less. A standard 13-inch gun used on the USS Indiana was expected to penetrate 1012 inches of Harvey armor. Testing showed that Carpenter\'s projectiles fired from the same gun could achieve penetrations of up to 15 inches. In November 1896, the Navy informed Congress that Carpenter\'s projectiles had tested successfully, calling them "the first made that would pierce improved armor plate". When exploded in Havana Harbor, Cuba, on February 15, 1898, "Remember the Maine!" became a rallying cry and the pace at Carpenter Steel became frantic as the demand for the new projectiles increased. Carpenter borrowed money against the\rhighlight sentence(s) containing evidence, not only the answer']}}]}, {'provenance': [{'wikipedia_id': '189610', 'title': 'USS Maine (ACR-1)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Havana Harbor', 'USS "Maine" (ACR-1) was a United States Navy ship that sank in Havana Harbor in February 1898, contributing to the outbreak of the SpanishAmerican War in April.', 'USS "Maine" (ACR-1) was a United States Navy ship that sank in Havana Harbor in February 1898, contributing to the outbreak of the SpanishAmerican War in April. American newspapers, engaging in yellow journalism to boost circulation, claimed that the Spanish were responsible for the ship\'s destruction. The phrase "Remember the "Maine!" To hell with Spain!" became a rallying cry for action. Although the "Maine" explosion was not a direct cause, it served as a catalyst that accelerated the events leading up to the war.']}}]}, {'provenance': [{'wikipedia_id': '603839', 'title': 'Charles Dwight Sigsbee', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Havana harbor', 'He is best remembered as the captain of the USS "Maine", which exploded in Havana harbor, Cuba, in 1898. The explosion set off the events that led up to the start of the SpanishAmerican War.']}}]}]