CREATE TABLE table_74470 ("Townland" TEXT, "Area (  acres  ) " FLOAT, "Barony" TEXT, "Civil parish" TEXT, "Poor law union" TEXT)

What is the poor law union of the Ardacrow townland?
SELECT "Poor law union" FROM table_74470 WHERE "Townland" = 'Ardacrow'
SELECT "Poor law union" FROM "table_74470" WHERE "Townland" = 'Ardacrow'