A young man in a green t-shirt strums his guitar while sitting cross-legged on the floor.
A man sings.
That the young man strums his guitar is not necessarily an indication that he i sings.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4.(n_floor(x4) & while(e1,e2) & on(e2,x4) & exists s3.(Theme(s3,x1) & a_cross-legged(s3)) & Topic(e2,p1) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x1) & v_strum(e1) & n_guitar(x3) & of(x3,x1) & n_male(x1) & in(x1,x2) & n_t-shirt(x2) & a_green(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists x1 x2.(a_topic(x1) & n_sing(x1) & of(x1,x2) & n_man(x2))