Complex sentence: In physics, an anyon is a type of particle that occurs only in "two"-dimensional systems, with properties much less restricted than fermions and bosons; the operation of exchanging two identical particles may cause a global phase shift but cannot affect observables.
Split into simpler sentences: In physics, an anyon is a type of particle that occurs only in two-dimensional systems. It is a generalization of the fermion and boson concept, in which the operation of exchanging two identical particles may cause a global phase shift but cannot affect observables.