The crowd watches the musher's dog sled.
The sled is visible.
The sled has to be visible while the crowd to watches.
exists e2 e1 x1 x2 x3 x4.(n_dog(x3) & of(x3,x2) & n_musher(x2) & n_crowd(x1) & Theme(e2,x3) & Actor(e2,x1) & v_watch(e2) & Actor(e1,x4) & v_sled(e1) & (x3 = x4))
exists s1 x1.(n_sled(x1) & Theme(s1,x1) & a_visible(s1))