I would recommend you to follow the following strategy:
* Search about a person and find something in common with you (school, degree etc). Try to focus on the partners
* Prepare a short and well written introductory email explaining who you are, how you found that person, and what you want from them (i.e. advice on the application process)
* Email it to the partner using their corporate email (If you don't get one, don't take it personally and move on to the next partner on your list)
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If you need any further help with networking, drop me a line.