CREATE TABLE table_43173 ("Name" CLOB, "Position" CLOB, "Number" CLOB, "School/Club Team" CLOB, "Season" CLOB, "Acquisition via" CLOB)

What season did School/Club Team, East have an Acquisition via of trade?
SELECT "Season" FROM table_43173 WHERE "Acquisition via" = 'trade' AND "School/Club Team" = 'east'
SELECT "Season" FROM "table_43173" WHERE "Acquisition via" = 'trade' AND "School/Club Team" = 'east'