A young girl is fishing with some elderly people, possibly her grandparents.
a girl caught big fish
A young girl fishing does not imply that she caught a big fish.
exists e1 s1 s2 x1 x2 x3.(with(e1,x2) & rel(x2,x3) & r_possibly(x3) & n_grandparent(x3) & of(x3,x1) & n_female(x1) & n_people(x2) & a_elderly(s2) & Theme(s2,x2) & Actor(e1,x1) & v_fish(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Time(e1,x3) & n_fish(x3) & a_big(s1) & Manner(e1,s1) & Theme(e1,x2) & v_catch(e1) & (x1 = x2) & n_girl(x1))