Original sentence: Noam Chomsky argued that Hoang Van Chi was unreliable because he received a grant from the Congress for Cultural Freedom--which was later revealed to have received funds from the Central Intelligence Agency--and further challenged the accuracy of Chi's translations of North Vietnamese documents
Edited sentence: Schoolars like Porter and Noam Chomsky indicated that Hoang Van Chi used to be employed and sponsored by South Vietnam and the US, and challenged the reliablity of Chi's translations of North Vietnamese documents