Question:
Where was Aleksander Rajchman educated in Feb, 1913?

Context:
 Aleksander Rajchman attended University of Paris from Jan, 1908 to Jan, 1912. 
 Aleksander Rajchman attended University of Warsaw from Jan, 1913 to Jan, 1914. 
 Aleksander Rajchman attended University of Vienna from Jan, 1914 to Jan, 1915. 
 Aleksander Rajchman attended Jagiellonian University from Jan, 1912 to Jan, 1913.

Answer:
University of Warsaw