Question: Mangal, born in Laghman is a prominent Afghan singer, who started in the early 1970s, he and his ex-wife Naghma, were a popular musical duo, Naghma is a prominent Afghan singer, who started her career in which time period?
Sentence (from "Ghulam Dastagir Shaida"): Ustad Shaida is considered as one of the great Ustads of Afghan classical music along with Ustad Sarahang and Ustad Rahim Bakhsh.
Relevant evidence: No