A man sits in front of an easel displaying various works of art while a horse-drawn buggy is in the background.
an artist is working on a painting
Sitting in front of an easel implies that an artist is working.
exists e2 e1 p1 s1 x1 x2 x3 x4 x5 x7.(n_background(x7) & for(e1,e2) & exists p2 s2 x6.(in(x6,x7) & n_buggy(x6) & a_horse-drawn(s2) & Theme(s2,x6)) & while(e2,p1) & Theme(e2,x4) & Actor(e2,x1) & v_display(e2) & of(x4,x5) & n_art(x5) & n_work(x4) & a_various(s1) & Theme(s1,x4) & in(e1,x2) & of(x2,x3) & n_easel(x3) & n_front(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_painting(x2) & Actor(e1,x1) & v_work(e1) & n_artist(x1))