Young boy riding a bicycle with an older man.
A boy is riding a bike with his grandpa and grandma.
Even though the young boy is with an older man, the man is not necessarily his grandpa, and there is no indication of there being a grandma there as well.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(e1,x4) & n_man(x4) & r_more(s2) & a_older(s2) & Theme(s2,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4 x5.(with(e1,x3) & n_grandma(x5) & n_grandpa(x4) & subset_of(x5,x3) & subset_of(x4,x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_boy(x1))