CREATE TABLE table_64578 ("Township" TEXT, "County" TEXT, "Pop.  ( 2010 ) " FLOAT, "Land  (  sqmi  ) " FLOAT, "Water  ( sqmi ) " FLOAT, "Latitude" FLOAT, "Longitude" FLOAT, "GEO ID" FLOAT, "ANSI code" FLOAT)

Which Water (sqmi) has a Township of yorktown, and a GEO ID smaller than 3802187940?
SELECT MIN("Water (sqmi)") FROM table_64578 WHERE "Township" = 'yorktown' AND "GEO ID" < '3802187940'
SELECT MIN("Water (sqmi)") FROM "table_64578" WHERE "GEO ID" < '3802187940' AND "Township" = 'yorktown'