CREATE TABLE table_58173 ("Heir" CLOB, "Status" CLOB, "Relationship to Monarch" CLOB, "Became heir" CLOB, "Reason" CLOB, "Ceased to be heir" CLOB, "Monarch" CLOB)

Which Reason is given when 1103 is the date for Became heir?
SELECT "Reason" FROM table_58173 WHERE "Became heir" = '1103'
SELECT "Reason" FROM "table_58173" WHERE "Became heir" = '1103'