_E. coli_ is a common [bacterium], found in the digestive system of all humans.
(_E. coli_; is; a common [bacterium], found in the digestive system of all humans) (a common [bacterium; found; L:in the digestive system of all humans)
_E. coli_ a common [bacterium
is found
a common [bacterium], found in the digestive system of all humans
L:in the digestive system of all humans