Electrical is related to Wire. Wire is related to Rope. Rope is related to Long. 
Voice can be used for Recording. Recording is related to Song. Song is related to Ear. Ear is a type of Attention. 
Electrical <--RelatedTo--> Wire <--RelatedTo--> Rope <--RelatedTo--> Long 
Voice --UsedFor--> Recording <--RelatedTo--> Song <--RelatedTo--> Ear --IsA--> Attention 