Question: The Sikorsky S-1 was the first fixed wing aircraft design by Igor Ivanovich Sikorsky, a Russian-American aviation pioneer in both helicopters and fixed-wing aircraft, first success came with which aircraft?
{'answer': 'S-2', 'supporting_facts': [['Sikorsky S-1', 0], ['Sikorsky S-1', 4], ['Igor Sikorsky', 0], ['Igor Sikorsky', 1]]}