I have a hierarchy of data and I need to create a UI to pick from this list. The data is structured something like an org chart, where teams have parent teams:

team seven
team three
--team one
--team two
----team four
---------team seven

Somehow, I want to show that some teams are "under" other team, so instead of just having a list, I thought of doing this:

team seven
team three
team three --> team one
team three --> team two
team three --> team two --> team four

But, this gets pretty wide pretty quickly if there is a deep tree.

Can someone give me some advice to create a multi select picker when there is lots of data and the data is in a hierarchy structure?