rule "Rule 1"
when
    ml: Message()
    mo: Message(ml after[0s,160s] this)
then
    System.out.println("ml:"+new Date(ml.timestamp));
    System.out.println("mo:"+new Date(mo.timestamp));
end

Message received{"timestamp":"Feb  8 19:39:45", ... }
ml:Sun Feb 08 19:39:45 IRST 1970
mo:Sun Feb 08 19:39:45 IRST 1970
Message received{"timestamp":"Feb  8 19:40:04", ... }
ml:Sun Feb 08 19:40:04 IRST 1970
mo:Sun Feb 08 19:39:45 IRST 1970
ml:Sun Feb 08 19:40:04 IRST 1970
mo:Sun Feb 08 19:40:04 IRST 1970
Message received{"timestamp":"Feb  8 19:40:15", ... }
ml:Sun Feb 08 19:40:15 IRST 1970
mo:Sun Feb 08 19:40:04 IRST 1970
ml:Sun Feb 08 19:40:15 IRST 1970
mo:Sun Feb 08 19:39:45 IRST 1970
ml:Sun Feb 08 19:40:15 IRST 1970
mo:Sun Feb 08 19:40:15 IRST 1970

rule "Rule 1"
when
    ml: Message()
    mo: Message(this before[0s,160s] ml)
then
    System.out.println("ml:"+new Date(ml.timestamp));
    System.out.println("mo:"+new Date(mo.timestamp));
end

Message received{"timestamp":"Feb  8 19:41:40", ... }
ml:Sun Feb 08 19:41:40 IRST 1970
mo:Sun Feb 08 19:41:40 IRST 1970
Message received{"timestamp":"Feb  8 19:41:57", ... }
ml:Sun Feb 08 19:41:57 IRST 1970
mo:Sun Feb 08 19:41:57 IRST 1970
Message received{"timestamp":"Feb  8 19:42:02", ... }
ml:Sun Feb 08 19:42:02 IRST 1970
mo:Sun Feb 08 19:42:02 IRST 1970