CREATE TABLE table_70455 ("Year" FLOAT, "Chassis" TEXT, "Engine" TEXT, "Tyres" TEXT, "Points" FLOAT)

Name the year for points less than 20 and chassis of dallara 3087
SELECT "Year" FROM table_70455 WHERE "Points" < '20' AND "Chassis" = 'dallara 3087'
SELECT "Year" FROM "table_70455" WHERE "Chassis" = 'dallara 3087' AND "Points" < '20'