CREATE TABLE table_204_191 (id DECIMAL, "title" TEXT, "artist" TEXT, "year" TEXT, "location/gps coordinates" TEXT, "material" TEXT, "dimensions" TEXT, "owner" TEXT)

how many years after the george gordon meade memorial was built was the victims of communism memorial built ?
SELECT (SELECT "year" FROM table_204_191 WHERE "title" = 'victims of communism memorial') - (SELECT "year" FROM table_204_191 WHERE "title" = 'george gordon meade memorial')
SELECT (SELECT "year" FROM "table_204_191" WHERE "title" = 'victims of communism memorial') - (SELECT "year" FROM "table_204_191" WHERE "title" = 'george gordon meade memorial')