A kid is climbing on a rope course.
The kid is doing situps.
One cannot be climbing and doing situps simultaneously.
exists e1 x1 x2 x3.(on(e1,x2) & n_course(x2) & of(x2,x3) & n_rope(x3) & Actor(e1,x1) & v_climb(e1) & n_kid(x1))
exists e1 x1 x2.(n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_situp(x2))