<https://www.d-series.org/threads/slight-%E2%80%9Cknocking%E2%80%9D-sound-at-idle-d15b-vtec.313421/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.d-series.org/threads/slight-%E2%80%9Cknocking%E2%80%9D-sound-at-idle-d15b-vtec.313421/>