A little boy in red shorts, a boy in a black Speedo, and a boy in gray shorts are all running on the beach.
Three boys in various outfits run along the beach
That the boys are wearing red shorts, black Speedo, and gray shorts, respectively, means that there are three boys in various outfits. This just states that, making it concise.
exists e1 s1 s2 s3 s4 s5 x1 x2 x3 x4 x5 x6 x7 x8.(n_beach(x8) & a_all(s5) & Manner(e1,s5) & on(e1,x8) & Actor(e1,x1) & v_run(e1) & subset_of(x6,x1) & in(x6,x7) & n_shorts(x7) & a_gray(s4) & Theme(s4,x7) & n_boy(x6) & subset_of(x2,x1) & in(x2,x3) & rel(x3,x4) & in(x4,x5) & n_speedo(x5) & a_black(s3) & Theme(s3,x5) & n_boy(x4) & n_shorts(x3) & a_red(s2) & Theme(s2,x3) & n_boy(x2) & a_little(s1) & Theme(s1,x2))
exists e1 s1 x1 x2 x3.(n_beach(x3) & along(e1,x3) & Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_outfit(x2) & a_various(s1) & Theme(s1,x2) & n_boy(x1) & card_eq_3(x1))