I want to know the answer to the following question:
How many investment and commercial banks were included in Clayton Holdings' analysis of January 2006 to June 2007 loans?
All the background I'm provided with is that "The analysis (conducted on behalf of 23 investment and commercial banks, including 7 "too big to fail" banks) additionally showed that 28% of the sampled loans did not meet the minimal standards of any issuer.". Is that enough to answer the question?
Answer: yes