Update an attribute of an existing entity in Core Data
<p>This is my first time using Core Data and I'm trying to figure out how to update an attribute on an entity that has already been created. </p>

<p>I have an app that when a Person entity is created there is also a entity created called Statement with a type of To Many. The Statement entity has several attributes. I would like to be able to update one of these attributes at a certain point in my apps lifecycle. I'm just not sure how to go about this. I know I need to figure how out which Person entity it is I want to update, and after I get the person I need to target the specific attribute of the Statement entity. I think this is where I might use a predicate, but I'm still not 100% sure on how they work. I'm just not sure where to start to solve my issues. Thanks</p>