A group of people in blue Arabian robes and white headdresses is on yellow bicycles in the street in front of a tall building.
A group of people a picking up biking as a hobby.
A group of people in bicycles aren't necessarily doing it for a hobby.
exists p1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x9.(n_street(x9) & in(p1,x6) & of(x6,x7) & n_building(x7) & a_tall(s4) & Theme(s4,x7) & n_front(x6) & exists s5 x8.(on(x1,x8) & in(x8,x9) & n_bicycle(x8) & a_yellow(s5) & Theme(s5,x8)) & of(x1,x2) & subset_of(x5,x2) & n_headdress(x5) & a_white(s3) & Theme(s3,x5) & subset_of(x3,x2) & in(x3,x4) & n_robe(x4) & a_arabian(s2) & Theme(s2,x4) & a_blue(s1) & Theme(s1,x4) & n_people(x3) & n_group(x1))
exists x1.(all s1 e1 x2.((n_biking(x2) & a_up(s1) & Theme(s1,x2) & Actor(e1,x2) & v_pick(e1)) -> exists x3 x4.(a_topic(x1) & of(x1,x3) & as(x3,x4) & n_hobby(x4) & for(x3,x2) & n_people(x3))) & n_group(x1))