What value for U.S. dance occurred in 1986 when the value of U.S. R&B was 9?
CREATE TABLE "solo" (
  "year" real,
  "title" text,
  "u_s" text,
  "u_s_r_b" text,
  "u_s_dance" text
);
SELECT "u_s_dance" FROM "solo" WHERE "year"=1986 AND "u_s_r_b"='9';