question: WHat program compliment reinvent the toilet
answer: It was complemented by a program called `` Grand Challenges Explorations '' ( 2011 to 2013 with some follow-up grants reaching until 2015 )
turker_answer: Reinvent the toilet was complemented by a program called `` Grand Challenges Explorations '' ( 2011 to 2013 , with some follow-up grants reaching until 2015 ) .
rule-based: It was complemented by a program called `` Grand Challenges Explorations '' ( 2011 to 2013 with some follow-up grants reaching until 2015 reinvent the toilet