Two girls swing a skipping rope which a third girl jumps
The girls are wearing school uniforms while playing.
Girls do not always wear school uniforms.
(x)
exists e2 e1 x1 x2 x3.(n_girl(x1) & while(e1,e2) & Actor(e2,x1) & v_play(e2) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_uniform(x2) & of(x2,x3) & n_school(x3))