scientists believe that 后面都是believe的宾语.
【what is called creativity】 is simply 【the ability to apply skills learned in one setting to problems in another setting】.
前面【】是主语从句.后面【】是宾语.
the ability to apply skills 【（省略that is）learned in one setting】 to problems in another setting
【】修饰skills.这部分的主干是the ability to apply A to B