A group of kids in a yard.
A gathering of children on the lawn
group of kids implies a  gathering of children.
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & in(x2,x3) & n_yard(x3) & n_kid(x2) & n_group(x1))
exists x1 x2 x3.(n_lawn(x3) & a_topic(x1) & of(x1,x2) & on(x2,x3) & n_child(x2) & n_gathering(x1))