What is the party of re-elected, incumbent Charles H. Grosvenor, who was first elected before 1894?
CREATE TABLE "ohio" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text
);
SELECT "party" FROM "ohio" WHERE "result"='re-elected' AND "first_elected"<1894 AND "incumbent"='charles h. grosvenor';