In a crowded concert a man in white is approaching the main singer who is wearing a yellow shirt.
A man is at a bar.
If a man is at a bar, he cannot be approaching someone at the same time.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6.(n_singer(x3) & a_main(s1) & Theme(s1,x3) & in(e2,x6) & n_concert(x6) & a_crowded(s3) & Theme(s3,x6) & Theme(e2,x3) & Actor(e2,x1) & v_approach(e2) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & n_shirt(x5) & a_yellow(s2) & Theme(s2,x5) & (x3 = x4) & in(x1,x2) & n_white(x2) & n_man(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_bar(x2)) & n_man(x1))