Three people sing into a microphone.
They are at a karaoke bar.
Sentence 1 is missing karaoke bar.
exists e1 x1 x2.(into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_people(x1) & card_eq_3(x1))
exists p1 x1.(n_thing(x1) & exists x2 x3.(at(x1,x2) & n_bar(x2) & of(x2,x3) & n_karaoke(x3)))