Question: What is the place of birth of Toghon (Son Of Kublai)'s father?
Sentence (from "Toghon (son of Kublai)"): He demanded from Đại Việt (mordern Vietnam) a route to Champa, which would trap the Champan army from both north and south, but it was rejected by retired emperor Trần Thánh Tông, whom was the "de facto" ruler of Đại Việt.
Relevant evidence: No