Conversation so far:
Where was Marissa Mayer born?
Marissa Mayer was born in Wausau, Wisconsin.
Who were her the parents of Marissa Mayer?
Marissa Mayer's parents are Margaret Mayer, an art teacher of Finnish descent, and Michael Mayer, an environmental engineer who worked for water companies.
Where did Marissa Mayer go to school?
Intending to become a pediatric neurosurgeon, Marissa Mayer took pre-med classes at Stanford University.
What else did Marissa Mayer study at Stanford University besides pre-med?
Intending to become a pediatric neurosurgeon, Mayer took pre-med classes at Stanford University. She later switched her major from pediatric neuroscience to symbolic systems.
Was Marissa Mayer good at studies at Stanford University?
Mayer went on to graduate with honors from Stanford with a BS in symbolic systems in 1997 and an MS in computer science in 1999.

Question: Did she have a second major?
Self-contained rewrite: Did Marissa Mayer have a second major at Stanford University?