(mbool 
    (
        (
            ("begin of time" "2003-11-20-06:06" TRUE FALSE) 
            TRUE) 
        (
            ("2003-11-20-06:06" "2003-11-20-07:02" TRUE FALSE) 
            FALSE) 
        (
            ("2003-11-20-07:02" "end of time" TRUE TRUE) 
            TRUE)))