Queries cross graphs

Hello,

I'm using a composite database KB that includes two graphs KB.actors and KB.searches

I need to get information about actors that are in KB.actors graph using ids of actors that are the result of a filtre on KB.searches.

I tried this query:

USE KB.searches

MATCH(n:Company) WHERE ...

WITH n.entityId as companyId

USE KB.actors

MATCH(n:Company)-[:ALIAS]->(a:Alias)

WHERE n.entityId=companyId

RETURN companyId, a.term

The query doesn't work "

USE can only appear at the beginning of a (sub-)query
"USE geotrend.actors

Is there any way to join data cross a composite database graphs? is it possible to do it?

Thanks,