CREATE TABLE table_203_94 (id NUMBER, "year" NUMBER, "player" CLOB, "country" CLOB, "score" CLOB, "to par" NUMBER, "margin\ of victory" CLOB, "course" CLOB, "location" CLOB, "purse  ( $ ) " NUMBER, "winner's\ share  ( $ ) " NUMBER)

how many strokes marked the margin of victory for justin rose in 2011 ?
SELECT "margin\nof victory" FROM table_203_94 WHERE "year" = 2011
SELECT "margin\nof victory" FROM "table_203_94" WHERE "year" = 2011