A man crouching down, attempting to use a machine of some sort.
The man is not standing.
when someone is crouching they aren't standing
exists e1 e2 p1 s1 x1 x2 x3.(a_topic(x1) & Topic(e2,p1) & Actor(e2,x3) & v_attempt(e2) & exists e3 x4 x5.(Theme(e3,x4) & Actor(e3,x3) & v_use(e3) & of(x4,x5) & n_sort(x5) & n_machine(x4)) & (x1 = x3) & a_down(s1) & Manner(e1,s1) & Actor(e1,x2) & v_crouch(e1) & (x1 = x2) & n_man(x1))
exists x1.(n_man(x1) & -exists e1.(Actor(e1,x1) & v_stand(e1)))