Read the text and determine if the sentence is true:

Eirik Jensen (born 30 July 1957) is a Norwegian drug trafficker and a former policeman. He was convicted of gross corruption and drug trafficking in a high-profile case in 2017, and sentenced to the maximum penalty in Norway, 21 years imprisonment. Jensen has also published a crime novel and an autobiography.

Sentence: Eirik Jensen will be 81 by the time he is released from prison.