When investigating allegations of harassment, the EEOC looks at the entire record: including the nature of the conduct, and the context in which the alleged incidents occurred. A determination of whether harassment is severe or pervasive enough to be illegal is made on a case-by-case basis.
Answer Wiki. According to Wikipedia, Frederic Rzewski's The Road is the longest non-repetitive piece of music written for the piano. This is a crucial distinction, because if we eliminate the requirement that a piece of music must be non-repetitive, then the longest piano piece is Vexations by Erik Satie.
I couldn't tell you the most difficult piece of piano music but it may be of interest to note that Liszt's transcendental etudes are simplified versions of his twelve grandes etudes. The only pianist I know of to record them is Leslie Howard who even said some passages are impossible to do justice.