Collector is a type of Worker. Assistant is a type of Worker. Instrument is a type of Assistant. 
Writing can be used for Information. Information is related to Personal. Personal is related to Car. Car is a type of Artifact. 
Collector --IsA--> Worker <--IsA-- Assistant <--IsA-- Instrument 
Writing --UsedFor--> Information <--RelatedTo--> Personal <--RelatedTo--> Car --IsA--> Artifact 