Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Trim visible fat from meat. Rub with onion and salt., , Place in slow cooker and add rootbeer till meat is half covered., , Cook on low for 7 hours or high for 3.5 hours. Turn over half way through., , After 7 hours, remove from slow cooker and pull meat apart with two forks., , Drain juice from slow cooker reserving 1/4 cup., , Return meat to slow cooker, add barbecue sauce and reserved juice., , Cook for another 1 hour at low or 30 minutes at high., , Serve on buns.
pork shoulder roast, rootbeer, onion, barbecue sauce, salt