In this task, you will be given a passage to read. A fill in the blank question will be given to you.  Your answer should fit the blank appropriately.
Q:  During the off @-@ season the Blue Jackets parted ways with defensemen Jan Hejda , Anton Stralman , Sami Lepisto and Mike Commodore . Hejda , who played four of his first five NHL seasons with the Blue Jackets , was offered a contract by Columbus , but felt that the organization undervalued him and left via free agency . Columbus had offered him a three @-@ year , $ 7 @.@ 5 million contract . He instead signed a four @-@ year , $ 13 million deal with the Colorado Avalanche . Stralman and Lepisto were not given qualifying offers which made them unrestricted free agents , and both signed with other teams . Commodore had originally signed a big contract with the Blue Jackets in 2008 , but fell out of favor . He was waived , sent to the minors and eventually had his contract bought out . In order to replace the departed players , Columbus not only acquired James Wisniewski , but also signed ten @-@ year NHL veteran Radek Martinek . Martinek played only seven games with the Blue Jackets before suffering a concussion and missing the remainder of the season . Brett Lebda was brought in to replace him . Gregorian Tower  The Gregorian Tower ( Italian : Torre Gregoriana ) or Tower of the Winds ( Italian : Torre dei Venti ) is a round tower located above the Gallery of Maps , which connects the Villa Belvedere with the Apostolic Palace in Vatican City . The tower was built between 1578 and 1580 to a design by the Bolognese architect Ottaviano Mascherino ( who was credited with building the Apostolic Palace ) mainly to promote the study of astronomy for the Gregorian Calendar Reform which was commissioned by Pope Gregory XIII and promulgated in 1582 . It was then also known as the Tower of Winds . The tower is now called the  Specola Astronomica Vaticana , the Vatican Observatory . Four stages of progressive development have occurred since it was first established . The tower was an edifice of great value for astronomical observations made using a sundial as they provided essential confirmation of the need to reform the Julian calendar . fill in the blank  :  During the off @-@ __________________ the Blue Jackets parted ways with defensemen Jan Hejda , Anton Stralman , Sami Lepisto and Mike Commodore . 
A: 
 season 