Each exam item (a question with its possible answers) has at least two references to standard books or other sources of project management. Most of the questions reference the PMI A Guide to the Project Management Body of Knowledge (aka the PMBOK Guide).
The Rite of Spring (Le Sacre du Printemps) is a ballet in two parts. The entire ballet was a concept developed by Igor Stravinsky. He wrote the music. The set and costumes were designed by Nicholas Roerich.
In countries with a Christian religious tradition, Easter holiday (in the United States it is sometimes known as Spring Break or Spring Vacation) is a school holiday that takes place in the northern spring, with the date varying by country and level of schooling.