The conversation between human and AI assistant.
[|Human|] Reading this paragraph, tell me what language did the people of Indus Valley civilization speak?
[|AI|] The language spoken by people of Harappa, a part of the Indus Valley Civilization, is unknown. Scholars, though, link their language's roots to the Dravidian or Elamo-Dravidian language family.
[|Human|] 
Reading this paragraph, tell me what language did the people of Indus Valley civilization speak?