The bark and needles of the hemlock or pine tree are boiled to make a vitamin C tonic.
(The bark and needles of the hemlock or pine tree; are boiled; ) (The bark and needles of the hemlock or pine tree; to make; a vitamin C tonic)
The bark and needles of the hemlock or pine tree The bark and needles of the hemlock or pine tree
are boiled to make
a vitamin C tonic