Breakdown of Wer diese Person kennt, soll es sagen.
es
it
sagen
to say
wer
who
kennen
to know (somebody/something)
dieser
this / that (fem.: diese, neut.: dieses)
sollen
should / ought to
die Person
the person (individual)
Elon.io is an online learning platform
We have an entire course teaching German grammar and vocabulary.