Arm-strokes from swimmers who are racing in the pool.
Swimmers are competing in the pool.
competing is a rephasing of racing.
exists e1 x1 x2 x3 x4.(n_pool(x4) & a_topic(x1) & from(x1,x2) & in(e1,x4) & Actor(e1,x3) & v_race(e1) & (x2 = x3) & n_swimmer(x2) & n_arm-stroke(x1))
exists e1 x1 x2.(n_pool(x2) & in(e1,x2) & Actor(e1,x1) & v_compete(e1) & n_swimmer(x1))