Firefighter responding to a call.
firefighter is responding to a cat stuck in a tree
A Firefighter responding to a call does not mean that it has to be for a cat stuck in a tree.
exists e1 x1 x2.(ne_nam_firefighter(x1) & to(e1,x2) & n_call(x2) & Actor(e1,x1) & v_respond(e1))
exists e2 e1 x1 x2 x3 x4.(to(e1,x2) & in(e2,x4) & n_tree(x4) & Theme(e2,x3) & v_stick(e2) & (x2 = x3) & n_cat(x2) & Actor(e1,x1) & v_respond(e1) & n_firefighter(x1))