A guy in a brown t-shirt and white pants is playing a horn.
The man is performing for people.
playing a horn  doesn't always mean performing for people.
exists e1 s1 s2 x1 x2 x3 x4 x5.(Theme(e1,x5) & Actor(e1,x1) & v_play(e1) & n_horn(x5) & in(x1,x2) & subset_of(x4,x2) & n_pants(x4) & a_white(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_t-shirt(x3) & a_brown(s1) & Theme(s1,x3) & n_guy(x1))
exists e1 x1 x2.(n_man(x1) & for(e1,x2) & n_people(x2) & Actor(e1,x1) & v_perform(e1))