People at a concert wave their hands in the air as they watch the singer and guitarist perform.
People sitting still at a concert.
people cannot be sitting still and wave their hands in the air simultaneously.
exists e1 p1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_guitarist(x9) & n_singer(x8) & subset_of(x9,x7) & subset_of(x8,x7) & n_air(x5) & a_topic(x1) & at(x1,x2) & Theme(e1,x6) & Actor(e1,x4) & v_perform(e1) & (x2 = x6) & in(x4,x5) & exists e2.(Theme(e2,x7) & Actor(e2,x1) & v_watch(e2)) & n_thing(x1) & n_thing(x1) & as(x5,p1) & n_hand(x4) & of(x4,x1) & n_wave(x2) & of(x2,x3) & n_concert(x3) & n_people(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_concert(x3) & a_still(s1) & Manner(e1,s1) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))