A black and white dog is going through an obstacle course.
a dog is racing through an obstical course in May
Not all obstacle courses happen in May.
exists e1 s1 s2 x1 x2 x3.(through(e1,x2) & n_course(x2) & of(x2,x3) & n_obstacle(x3) & Actor(e1,x1) & v_go(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_date(x3) & a_date_month_05(x3) & a_date_month_05(x3) & in(e1,x3) & through(e1,x2) & n_course(x2) & a_obstical(s1) & Theme(s1,x2) & Actor(e1,x1) & v_race(e1) & n_dog(x1))