A group of people are running a marathon in winter.
the people are running in a group a long a course.
A marathon by definition is a long course.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_run(e1) & in(x3,x4) & n_winter(x4) & n_marathon(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_people(x1) & n_course(x3) & r_long(x3) & Time(e1,x3) & in(e1,x2) & n_group(x2) & Actor(e1,x1) & v_run(e1))