A man in a uniform is crossing a street.
A boy in jeans and a ripped T-shirt sits in the shade of a large tree.
There is either a man or a boy, not both.  The man is in uniform, the boy's jeans and ripped T-shirt are not a uniform.  The man is actively moving, crossing the street, while the boy is sitting still.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_cross(e1) & n_street(x3) & in(x1,x2) & n_uniform(x2) & n_man(x1))
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(n_shade(x5) & in(e2,x5) & of(x5,x6) & n_tree(x6) & a_large(s1) & Theme(s1,x6) & Actor(e2,x1) & v_sit(e2) & subset_of(x4,x1) & n_t-shirt(x4) & Theme(e1,x4) & v_rip(e1) & subset_of(x2,x1) & in(x2,x3) & n_jeans(x3) & n_boy(x2))