You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Imperial_College_London

Context:
The College's endowment is sub-divided into three distinct portfolios: (i) Unitised Scheme – a unit trust vehicle for College, Faculties and Departments to invest endowments and unfettered income to produce returns for the long term; (ii) Non-Core Property – a portfolio containing around 120 operational and developmental properties which College has determined are not core to the academic mission; and (iii) Strategic Asset Investments – containing College’s shareholding in Imperial Innovations and other restricted equity holdings. During the year 2014/15, the market value of the endowment increased by £78 million (18%) to £512.4 million on 31 July 2015.

Question:
How many distinct portfolios is the College's endownment divided into?

three