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Six years after its foundation , with the permission ( ) of the Ottoman Sultan , the first campus ( at present , it is the South Campus of Boğaziçi University ) was built in Bebek at the ridge of Rumelia Fortress , very close to a Bektashi tekke , whose leaders maintained an excellent relationship with the Congregational and Presbyterian founders of Robert College , according to Dr Friedrich Schrader , who was , as a German , lecturer at Robert College during the 1890s .
 Ottoman, Boğaziçi University, Bebek, Bektashi, Friedrich Schrader
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ottoman, Boğaziçi University, Bebek, Bektashi, Friedrich Schrader