Fatigue also can be due to a buildup of the waste-product carbon dioxide in the lungs-- it's exit blocked by the tumor.
(Fatigue; can be; due to a buildup of the waste-product carbon dioxide in the lungs-- it's exit) (it; 's; exit blocked by the tumor) (exit; blocked; by the tumor)
Fatigue it exit
can be 's blocked
due to a buildup of the waste-product carbon dioxide in the lungs-- it's exit
exit blocked by the tumor
by the tumor