A person walking along a snow covered walkway at night.
The person is walking on a clear ground on a summer day.
The ground cannot be both clear and snow covered at the same time. It can be either night or day.
exists e1 e2 x1 x2 x3 x4 x5.(at(e2,x5) & n_night(x5) & Theme(e2,x4) & Actor(e2,x1) & v_cover(e2) & n_walkway(x4) & along(e1,x3) & n_snow(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_person(x1))
exists e1 s1 x1 x2 x3 x4.(n_person(x1) & on(e1,x3) & n_day(x3) & of(x3,x4) & n_summer(x4) & on(e1,x2) & n_ground(x2) & a_clear(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1))