There are two people rock climbing, one is on the ground while the other climbs.
Two rock climbers on the rocks for the first time
There are two people rock climbing, one is on the ground while the other climbs does not mean they are on the rocks for the first time
exists p1 x1 x6 x7.(-(x6 = x3) & n_climb(x6) & n_ground(x7) & exists p2 x2.((x1 = x2) & exists p3 x3 x4 x5.(while(p3,x6) & n_climb(x3) & n_climb(x3) & on(x3,x7) & rel(x3,x5) & n_thing(x5) & card_eq_1(x5) & of(x3,x4) & n_rock(x4)) & that(x2,p2) & n_people(x2) & card_eq_2(x2)))
exists s1 x1 x2 x3.(n_time(x3) & a_first(s1) & Theme(s1,x3) & a_topic(x1) & on(x1,x2) & for(x2,x3) & n_rock(x2) & n_rock(x2) & n_climber(x1) & of(x1,x2) & card_eq_2(x1))