Levers belong to a class of objects called "simple machines" because they all have a minimal amount of moving parts.
(Levers; belong; to a class of objects; because they all have a minimal amount of moving parts) (objects; called; simple machines) (they; have; a minimal amount of moving parts)
Levers objects they
belong called have
to a class of objects because they all have a minimal amount of moving parts
simple machines
a minimal amount of moving parts