What is the prefix for the formula of Rsor'?
CREATE TABLE table_name_75 (prefix VARCHAR, formula VARCHAR)
SELECT prefix FROM table_name_75 WHERE formula = "rsor'"
### Context: CREATE TABLE table_name_75 (prefix VARCHAR, formula VARCHAR) ### Question: What is the prefix for the formula of Rsor'? ### Answer: SELECT prefix FROM table_name_75 WHERE formula = "rsor'"