Which Year has a Location of dinas on 13 january?
CREATE TABLE "mining_disasters_in_the_rhondda_valley_1" (
  "colliery" text,
  "location" text,
  "date" text,
  "year" real,
  "death_toll" real,
  "cause" text
);
SELECT "year" FROM "mining_disasters_in_the_rhondda_valley_1" WHERE "location"='dinas' AND "date"='13 january';