A child practices hitting a baseball into a net, while two adult men watch.
Someone is practicing.
A child is someone when the name of the child is unknown.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e2,x7) & Actor(e2,x2) & v_watch(e2) & (x1 = x7) & while(e1,x6) & n_man(x6) & a_adult(s1) & Theme(s1,x6) & card_eq_2(x6) & into(e1,x5) & n_net(x5) & Theme(e1,x4) & Actor(e1,x3) & v_hit(e1) & n_baseball(x4) & (x2 = x3) & n_practice(x2) & n_child(x1))
exists e1 x1.(Actor(e1,x1) & v_practice(e1) & n_person(x1))