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.

Combine amaro, Aperol, bourbon, and lemon juice in a cocktail shaker. Fill with ice and shake vigorously until outside of shaker is frosty, about 20 seconds. Strain into 2 coupe glasses.
amaro, bourbon, lemon juice