Rumor is a type of Information. Information is related to Notice. Notice is related to Inform. Inform is a type of Change. 
one thing you do when you Practice is Improve. Training is a type of Practice. Training is a type of Teaching. 
Rumor --IsA--> Information <--RelatedTo--> Notice <--RelatedTo--> Inform --IsA--> Change 
Improve <--HasSubevent-- Practice <--IsA-- Training --IsA--> Teaching 