Young men are rocking out on stage.
The men are playing air guitar.
Young men rocking out on stage doesn't mean they are playing air guitar.
exists e1 s1 s2 x1 x2.(a_out(s2) & Manner(e1,s2) & on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_rock(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & of(x2,x3) & n_air(x3))