An older couple and a middle-aged woman tend a garden plot in a fenced yard.
Three people are gardening.
Since the older couple is made of two people and the middle-aged woman is one person, and they are all gardening, then three people must be gardening.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(in(e1,x6) & n_yard(x6) & a_fenced(s3) & Theme(s3,x6) & Theme(e1,x4) & Actor(e1,x1) & v_tend(e1) & n_plot(x4) & of(x4,x5) & n_garden(x5) & subset_of(x3,x1) & n_woman(x3) & a_middle-aged(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_couple(x2) & r_more(s1) & a_older(s1) & Theme(s1,x2))
exists e1 x1.(Actor(e1,x1) & v_garden(e1) & n_people(x1) & card_eq_3(x1))