A bicyclist in a white shirt and black shirt is fixing a bike on the sidewalk while other look on.
The biker is riding his bike up the hill.
A person can't be fixing a bike at the same time as he is riding a bike.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(n_look(x8) & n_sidewalk(x6) & a_on(s3) & Manner(e1,s3) & while(e1,x7) & -(x7 = x8) & n_look(x7) & Theme(e1,x5) & Actor(e1,x1) & v_fix(e1) & on(x5,x6) & n_bike(x5) & in(x1,x2) & n_shirt(x4) & a_black(s2) & Theme(s2,x4) & n_shirt(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_white(s1) & Theme(s1,x2) & n_bicyclist(x1))
exists e1 x1 x2 x3.(n_hill(x3) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_biker(x1) & up(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))