Question:
Who was the head of Sant Fost de Campsentelles in Sep, 2013?

Context:
 Carles Miquel i Ruzafa is the head of the government of Sant Fost de Campsentelles from Sep, 2019 to Mar, 2021. 
 Maria José Sánchez i Ortega is the head of the government of Sant Fost de Campsentelles from Jun, 2019 to Sep, 2019. 
 Montserrat Sanmarti Pratginestós is the head of the government of Sant Fost de Campsentelles from May, 2008 to Jun, 2019.

Answer:
Montserrat Sanmarti Pratginestós