Complex sentence: In probability theory, a Markov model is a stochastic model used to model randomly changing systems where it is assumed that future states depend only on the current state, not on the events that occurred before it (that is, it assumes the Markov property).
Split into simpler sentences: In probability theory, a Markov model is a stochastic model used to model randomly changing systems. It is assumed that future states depend only on the current state, not on the events that occurred before it (that is, it assumes the Markov property).