An older man is skydiving.
A boy chases his sister at the park.
An older sister at the park and man is skydiving.
exists e1 s1 x1.(Actor(e1,x1) & v_skydive(e1) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_park(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_sister(x2) & of(x2,x1) & n_male(x1) & n_boy(x1))