Help is related to Emergency. Emergency is a type of Hazard. Hazard is related to Threat. Threaten is derived from Threat. 
Comment is a type of Explain. Explain is related to Instruction. 
Help <--RelatedTo--> Emergency --IsA--> Hazard <--RelatedTo--> Threat <--DerivedFrom-- Threaten 
Comment --IsA--> Explain <--RelatedTo--> Instruction 