These particles are so sparsely distributed that an anemometer (a device to measure wind speed) would be rendered useless in trying to measure their velocity.
(a device; to measure; wind speed) (These particles; are so sparsely distributed; ) Context(These particles are so sparsely distributed,List([0, 43))):(an anemometer; would be rendered; useless)
These particles are so sparsely distributed,List([0, 43))
a device These particles an anemometer
to measure are so sparsely distributed would be rendered
wind speed
useless