Classify the following Greek philosophers by their schools of thought: Democritus, Anaximander, Protagoras, Epictetus, Chrysippus, Theano, Pythagorus and Heraclides.
There were many diverse schools of thought in Ancient Greek philosophy. Democritus was a pre-socratic philosopher who founded the discipline of Atomism. Anaximander was another pre-socratic thinker who was a member of the Milesian school. Epictetus and Chrysippus were both stoic philosophers. Protagoras was a famous sophist who was referenced by Plato. Heraclides was a Platonist and direct student of Plato. Pythagoras and Theano were both of the Pythagorean school, and are believed to have been married.
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### Instruction: Classify the following Greek philosophers by their schools of thought: Democritus, Anaximander, Protagoras, Epictetus, Chrysippus, Theano, Pythagorus and Heraclides.
### Input: 
### Response: There were many diverse schools of thought in Ancient Greek philosophy. Democritus was a pre-socratic philosopher who founded the discipline of Atomism. Anaximander was another pre-socratic thinker who was a member of the Milesian school. Epictetus and Chrysippus were both stoic philosophers. Protagoras was a famous sophist who was referenced by Plato. Heraclides was a Platonist and direct student of Plato. Pythagoras and Theano were both of the Pythagorean school, and are believed to have been married.