CREATE TABLE table_10506 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

What is the time/retired for jo siffert with a grid under 11?
SELECT "Time/Retired" FROM table_10506 WHERE "Grid" < '11' AND "Driver" = 'jo siffert'
SELECT "Time/Retired" FROM "table_10506" WHERE "Driver" = 'jo siffert' AND "Grid" < '11'