
(1) the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes;The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors.(2) the nature of the copyrighted work;
(3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and
(4) the effect of the use upon the potential market for or value of the copyrighted work.