CREATE TABLE table_202_250 (id NUMBER, "year" CLOB, "name" CLOB, "source" CLOB, "definition" CLOB)

which is the most recent source for the name ?
SELECT "source" FROM table_202_250 ORDER BY "year" DESC LIMIT 1
SELECT "source" FROM "table_202_250" ORDER BY "year" DESC FETCH FIRST 1 ROWS ONLY