premise: A male performer sings and plays the guitar in front of a microphone.
hypothesis: A man is singing a song.
explanation_1: Sentence one already said that the man was singing and if he was singing, then he would have to be singing a song.
explanation_2: A performer who sings is singing.
explanation_3: A man is singing and he can only be singing a song.
premise_logic: (x)
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_song(x2) & n_man(x1))