While we experiment with new materials, we always need to make sure that there is enough proven wood already burning.
(we; experiment; with new materials) (enough proven wood; burning; T:already) (we; need; to make sure that there is enough proven wood; T:always) Context(we need,List([40, 54))):(we; need to make; sure that there is enough proven wood)
we need,List([40, 54))
we enough proven wood we we
experiment burning need need to make
with new materials
T:already
to make sure that there is enough proven wood T:always
sure that there is enough proven wood