(swrlb:subtractDayTimeDurations(?orderedSince, ?deliveryDay, ?orderDay)  ^
swrlb:greaterThanOrEqual(?orderedSince, 2)  ^
swrlb:greaterThanOrEqual(?deliveryHour, 7)  ^
swrlb:lessThanOrEqual(?deliveryHour, 20)  ^
swrlb:member(?deliveryContinent, (http://en.wikipedia.org/wiki/North_america http://en.wikipedia.org/wiki/Europe))  ^
swrlb:lessThanOrEqual(?packageWeight, 50)) =>  shippment(?package)