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In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Besides lichens what living things can be used to describe living together?, Context: Symbiosis (from Greek "together" and "living") is close and often long-term interaction between two different biological species. In 1877 Albert Bernhard Frank used the word symbiosis (which previously had been used to depict people living together in community) to describe the mutualistic relationship in lichens. In 1879, the German mycologist Heinrich Anton de Bary defined it as "the living together of unlike organisms."
Output:
people