I want to know the answer to the following question:
what single introduced dub and reggae into the house sound?
All the background I'm provided with is that "The music continued to grow and change, as typified by Leftfield with "Release the Pressure", which introduced dub and reggae into the house sound, although Leftfield had prior releases, such as "Not Forgotten" released in 1990 on Sheffield's Outer Rhythm records.". Is that enough to answer the question?
Answer: yes