Man in brown shirt and jeans playing guitar and singing.
A person is singing.
A man is a person, so if the man is singing a person is singing.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & in(x1,x2) & subset_of(x4,x2) & Theme(e1,x6) & Actor(e1,x5) & v_play(e1) & n_singing(x8) & n_guitar(x7) & subset_of(x8,x6) & subset_of(x7,x6) & (x4 = x5) & n_jeans(x4) & subset_of(x3,x2) & n_shirt(x3) & a_brown(s1) & Theme(s1,x3) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_sing(e1) & n_person(x1))