Context: Since the launch of the "Reinvent the Toilet Challenge", more than a dozen research teams, mainly at universities in the U.S., Europe, India, China and South Africa, have received grants to develop innovative on-site and off-site waste treatment solutions for the urban poor. The grants were in the order of 400,000 USD for their first phase, followed by typically 1-3 million USD for their second phase; many of them investigated resource recovery or processing technologies for excreta or fecal sludge.

Question: What countries have received grants 
Answer: universities in the U.S., Europe, India, China and South Africa, have received grants to develop innovative on-site and off-site waste treatment solutions

Question: How much were the grants for 
Answer: The grants were in the order of 400,000 USD for their first phase, followed by typically 1-3 million USD for their second phase

Question: What did many investigate 
Answer: many of them investigated resource recovery or processing technologies for excreta or fecal sludge.

Question: What did the Reinvent the Toilet Challenge investigate?
Answer: Unanswerable

Question: What off-site treatment solutions received grants?
Answer: Unanswerable

Question: After receiving 1-3 million for the first phase how much were the grants for the second phase?
Answer: Unanswerable

Question: How many teams received grants to help universities?
Answer: Unanswerable

Question: Since the launch of investigating resource recovery what did the grants develop?
Answer: Unanswerable