Erzincan Province (Turkish: Erzincan ili) is a province in the eastern region of Anatolia, Turkey, and home to Erzincan, a city which was destroyed and rebuilt after an earthquake of magnitude 7.9 on December 27, 1939. (http://en.wikipedia.org/wiki/Erzincan_Province)
In differential geometry, a caustic is the envelope of rays either reflected or refracted by a manifold. It is related to the concept of caustics in geometric optics. (https://en.wikipedia.org/wiki/Caustic_(mathematics))
A landlord is a person or entity receiving rent from a tenant. (FAO. 2003. Multilingual Thesaurus on Land Tenure. https://openknowledge.fao.org/handle/20.500.14283/x2038e)
