An Example of Sigma Query

SELECT type, color
CLUSTER *
FROM { SELECT object
       CLUSTER {object: *}
       FROM  { SELECT time
               CLUSTER {time: *}
               FROM video3 } }
WHERE color='green' AND type='vehicle'

An Example of Sigma Query

SELECT type, color CLUSTER * FROM { SELECT object CLUSTER {object: *} FROM { SELECT time CLUSTER {time: *} FROM video3 } } WHERE color='green' AND type='vehicle'

SELECT type, color CLUSTER * FROM { SELECT object CLUSTER {object: } FROM { SELECT time CLUSTER {time: } FROM video3 } } WHERE color='green' AND type='vehicle'