The boy in the red shirt climbs a large rock.
The boy is climbing a rock.
The boy is currently climbing a large rock.
exists e1 s1 s2 x1 x2 x3.(n_shirt(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1) & Theme(e1,x3) & Actor(e1,x1) & v_climb(e1) & n_rock(x3) & a_large(s2) & Theme(s2,x3) & in(x1,x2))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_rock(x2))