A boy in a gray shirt is skateboarding.
A boy is out skateboarding.
A gray shirt doesn't stop a boy from going out skateboarding.
exists e1 s1 x1 x2.(Actor(e1,x1) & v_skateboard(e1) & in(x1,x2) & n_shirt(x2) & a_gray(s1) & Theme(s1,x2) & n_boy(x1))
exists p1 x1.(exists x2.(out(x1,x2) & n_skateboard(x2)) & n_boy(x1))