Guy riding a bicycle down a grassy trail.
Rob makes for that salad.
One cannot ride a bicycle and make salad at the same time.
exists e1 s1 x1 x2 x3.(ne_nam_guy(x1) & down(e1,x3) & n_trail(x3) & a_grassy(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2))
exists e1 x1 x2.(n_salad(x2) & ne_per_rob(x1) & for(e1,x2) & Actor(e1,x1) & v_make(e1))