The sample will be tested to find the people with clean blood that can be used to make vaccine.
(The sample; will be tested; to find the people with clean blood) (The sample; to find; the people with clean blood) (clean blood; can be used; to make vaccine) (clean blood; to make; vaccine)
The sample The sample clean blood clean blood
will be tested to find can be used to make
to find the people with clean blood
the people with clean blood
to make vaccine
vaccine