Simplify the following text for a Grade 8 native English-speaking person.
Original: These generally short-lived systems may be either cold core or warm core , and in 1972 this type of subtropical cyclone was referred to as a `` neutercane '' .
Simplified: They may be either cold core or warm core , and for some time in 1972 this type of subtropical cyclone was called as a `` neutercane '' .