A boy in swim trunks does a backflip into the ocean while mountains show through the fog behind him.
A boy in jeans front flips onto a frozen lake
The boy cannot wear jeans and swim trunks at the same time.  He cannot do back flips and front flips at the same time.  He cannot be at the ocean and a frozen lake.
exists e1 p1 x1 x2 x3 x4 x5 x7.(n_male(x5) & n_fog(x7) & n_ocean(x5) & exists e2 x6.(through(e2,x7) & behind(x7,x5) & Actor(e2,x6) & v_show(e2) & n_mountain(x6)) & while(e1,p1) & into(e1,x5) & Theme(e1,x4) & Actor(e1,x1) & v_do(e1) & n_backflip(x4) & in(x1,x2) & n_trunk(x2) & of(x2,x3) & n_swim(x3) & n_boy(x1))
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & onto(x2,x4) & n_lake(x4) & a_frozen(s2) & Theme(s2,x4) & n_flip(x2) & a_front(s1) & Theme(s1,x2) & of(x2,x3) & n_jeans(x3) & n_boy(x1))