Two people are diving over a couple of logs.
The people use the logs for diving practice.
When people are diving over logs, it does not mean that they use the logs for PRACTICE.
exists e1 x1 x2 x3.(over(e1,x2) & of(x2,x3) & n_log(x3) & n_couple(x2) & Actor(e1,x1) & v_dive(e1) & n_people(x1) & card_eq_2(x1))
exists e1 e2 x1 x2 x3 x4.(n_log(x2) & n_people(x1) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_dive(e2) & n_practice(x4) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1))