Chat Help

So I am trying to code something where if the message included the word "anvil" anywhere in the text (example: "Man I need a anvil) it will detect this and run the code.

Second I want to be able to group the blocks that are spawned that way when the player dies they automatically despawn. (for example every block has the id of 1 and once the player dies every block with the ID of 1 gets removed)