What are the name of entrepreneurs whose investor is not "Rachel Elnaugh"?
SELECT T2.Name FROM entrepreneur AS T1 JOIN people AS T2 ON T1.People_ID   =   T2.People_ID WHERE T1.Investor! =  "Rachel Elnaugh"
entrepreneurs whose investor is not 'Rachel Elnaugh' refers to a JOIN operation between entrepreneur and people tables based on People_ID with a WHERE condition filtering out 'Rachel Elnaugh' as the investor;