Name the horizontal 0 for  明弦（ry日月）
CREATE TABLE "triangles_and_their_sides" (
  "number" real,
  "name" text,
  "vertices" text,
  "hypotenuse_0_c" text,
  "vertical_0_b" text,
  "horizontal_0_a" text
);
SELECT "horizontal_0_a" FROM "triangles_and_their_sides" WHERE "hypotenuse_0_c"='明弦（RY日月）';