Little blond boy climbing a big rock.
A boy is sliding down a hill.
Climbing and sliding are different actions that cannot be done simultaneously.
exists e1 s1 s2 s3 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_rock(x3) & a_big(s3) & Theme(s3,x3) & (x1 = x2) & n_boy(x1) & a_blond(s2) & Theme(s2,x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & n_hill(x2) & n_boy(x1))