Question:  Hugo Ferreira and Glenn Gregory are both singers and what?
Sentence (from "Naked as Advertised"): The album contained re-workings of tracks such as "Temptation" along with versions of Martyn Ware songs best known from his time with the Human League, including "Being Boiled" and "Empire State Human", as well as a cover of The Associates' hit "Party Fears Two".
Relevant evidence: No