I am using the neo4j movie database and I need to obtain the role names of actors in a particular movie. I have tried this command:

```
MATCH (wallstreet:Movie { title: 'Wall Street' })<-[:ACTS_IN]-(actor)
RETURN actor.roles

```

but this command just returns null. The following screenshot shows that "roles" exist in the properties but I still can't make it work. What query should I use for this purpose?
[![Screenshot](https://i.stack.imgur.com/T8t4C.png)](https://i.stack.imgur.com/T8t4C.png)