CREATE TABLE table_75360 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

Name the average ERP W and call sign of w237br
SELECT AVG("ERP W") FROM table_75360 WHERE "Call sign" = 'w237br'
SELECT AVG("ERP W") FROM "table_75360" WHERE "Call sign" = 'w237br'