How can I remove unwanted data in a cell and leave only the needed information? For example below, I only need to keep the last line AJ and the data behiind it. I want to get rid of everthing else and not by doig it manually. There is an entire column and like 15K lines with cells like this.

"NOTE CODE::NOTE DESC::NOTE VALUE::TOLERANCE
SP::SPECIAL: SHIPPED WITH ROD COLLAPSED
SP::SPECIAL: SHIPPED WITH NUT THREADED ON ROD
AG::FINISH SPECS: AS PURCHASED
AA::NUMBER STAMPED ON UNIT::752802::
SP::SPECIAL:::Gabriel Equivalent Kit 141682::
SP::SPECIAL:::ADD Part No. 474774::
FF::FREE FORM NOTE::2000-01 Nissan Maxima/Infiniti I30/I35 FL::
AJ::PRODUCT WEIGHT::12.8 lbs [/b](5.8 kgs)::"