Some sources say elephant shrews are noctural, active at night, others diurnal, active by day.
(Some sources; say; elephant shrews are noctural, active at night) Context(Some sources say,List([0, 16))):(elephant shrews; are active; noctural)
Some sources say,List([0, 16))
Some sources elephant shrews
say are active
elephant shrews are noctural, active at night
noctural