Question: Who is a songwriter and musician as well as lead singer, Minoru Niihara or Robert Plant?
Sentence (from "Robert Plant"): Robert Anthony Plant, {'1': ", '2': ", '3': ", '4': "} (born 20 August 1948) is an English singer, songwriter, and musician, best known as the lead singer and lyricist of the rock band Led Zeppelin.
Relevant evidence: Yes