Trademarked versions include Covidien "Corvac" tubes.

Entity and relation annotations:
id: 0
type: entity
value: text: Covidien
labels: <Organization>
id: 1
type: entity
value: text: "Corvac" tubes
labels: <Production>
type: relation
to_id: 1
labels: Organization:develops/produces/sells:Production
from_id: 0