A man wearing a red shirt is shown among other men in the background talking to each other.
the man is a singer
A man wearing a red shirt among other men is not necessarily a singer.
exists e3 e2 e1 s1 x1 x2 x3 x4 x5 x6.(n_background(x5) & among(e2,x4) & all x7.(n_other(x7) -> to(e3,x7)) & Actor(e3,x6) & v_talk(e3) & (x4 = x6) & in(x4,x5) & -(x4 = x1) & n_man(x1) & n_man(x1) & n_man(x4) & Theme(e2,x1) & v_show(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2))
exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_singer(x2)))