CREATE TABLE table_48817 ("Game" TEXT, "Date" TEXT, "Home Team" TEXT, "Result" TEXT, "Road Team" TEXT)

Who was the home team when Boston is the road team in game 4?
SELECT "Home Team" FROM table_48817 WHERE "Road Team" = 'boston' AND "Game" = 'game 4'
SELECT "Home Team" FROM "table_48817" WHERE "Game" = 'game 4' AND "Road Team" = 'boston'