CREATE TABLE "1066_to_1135" (
  "heir" text,
  "status" text,
  "relationship_to_monarch" text,
  "became_heir" text,
  "reason" text,
  "ceased_to_be_heir" text,
  "monarch" text
);

Question: Who is the Monarch whose Heir is Robert Curthose when the Reason is that the father became king?
SQL: SELECT "monarch" FROM "1066_to_1135" WHERE "heir"='robert curthose' AND "reason"='father became king';

Question: Which Monarch has succession unclear 1100-1103 as his Status?
SQL: SELECT "monarch" FROM "1066_to_1135" WHERE "status"='succession unclear 1100-1103';

Question: Which Reason is given when 1103 is the date for Became heir?
SQL: SELECT "reason" FROM "1066_to_1135" WHERE "became_heir"='1103';

Question: What is the Status when Henry I is the Monarch and the Reason is succession unclear 1100-1103?
SQL: SELECT "status" FROM "1066_to_1135" WHERE "monarch"='henry i' AND "reason"='succession unclear 1100-1103';