A man in a white outfit is standing in a leaning forward position with other people in similar outfits standing in the background.
A man in white is in front while other people also is white are behind him.
To be in a white outfit means to be "in white". When a man is standing with other people in the background it means he is standing in front and the other people are behind him.
exists e2 e3 e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(n_background(x8) & n_people(x5) & with(e1,x4) & in(e3,x8) & Actor(e3,x7) & v_stand(e3) & (x4 = x7) & in(x4,x6) & n_outfit(x6) & a_similar(s3) & Theme(s3,x6) & -(x4 = x5) & n_people(x4) & in(e1,x3) & n_position(x3) & a_forward(s2) & Theme(s2,x3) & Actor(e2,x3) & v_lean(e2) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_outfit(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists p1 p2 x1 x2 x5.(n_male(x5) & n_people(x5) & exists p3 s1 s2 x4 x6.(behind(x4,x5) & a_also(s2) & Manner(s1,s2) & Theme(s1,x6) & a_white(s1) & (x4 = x6) & -(x4 = x5) & n_people(x4)) & while(p1,p2) & exists x3.(in(x1,x3) & n_front(x3)) & in(x1,x2) & n_white(x2) & n_man(x1))