A young girl is about to attempt to hit a tennis ball.
This is her first tennis lesson
A girl hitting a tennis ball is not necessarily having her first lesson.
exists p1 s1 s2 x1.(Topic(s2,p1) & Actor(s2,x1) & a_about(s2) & exists e1 p2.(Topic(e1,p2) & Actor(e1,x1) & v_attempt(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_hit(e2) & n_ball(x2) & of(x2,x3) & n_tennis(x3))) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists p1 s1 x1 x2 x3.(n_lesson(x2) & of(x2,x3) & n_tennis(x3) & a_first(s1) & Theme(s1,x2) & of(x2,x1) & n_female(x1) & n_thing(x1) & (x1 = x2))