A group of teens jumping joyfully.
The teens are zombies.
The teens jumping joyfully wouldn't be able to jump if the teens were zombies.
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_joyfully(s1) & Manner(e1,s1) & Actor(e1,x3) & v_jump(e1) & (x1 = x3) & of(x1,x2) & n_teens(x2) & n_group(x1))
exists p1 x1.(n_teens(x1) & exists x2.((x1 = x2) & n_zombie(x2)))