Simplify the following text for a Grade 4 native English-speaking person.
Original: The material they recorded was released in 1956 on an album whose title , Birth of the Cool , gave its name to the `` cool jazz '' movement that developed at the same time and partly shared the musical direction begun by Davis ' group .
Simplified: This music was released on an album called Birth of the Cool . This album gave its name to a new style of jazz called `` cool jazz '' .