On a sunny day, the sidewalk is crowded with people in the shopping district of this mountainous town.
A boy learns to climb a hill.
A boy that is learning to climb a hill probably isn't doing it on sidewalk.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_town(x5) & a_mountainous(s1) & Theme(s1,x5) & n_district(x3) & of(x3,x4) & n_shopping(x4) & n_sidewalk(x1) & on(e1,x6) & n_day(x6) & a_sunny(s2) & Theme(s2,x6) & with(e1,x2) & in(x2,x3) & of(x3,x5) & n_people(x2) & Theme(e1,x1) & v_crowd(e1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_learn(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_climb(e2) & n_hill(x2)) & n_boy(x1))