Question:
Who was the head of Sant Fost de Campsentelles in Aug, 2019?

Context:
 Montserrat Sanmarti Pratginestós is the head of the government of Sant Fost de Campsentelles from May, 2008 to Jun, 2019. 
 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.

Answer:
Maria José Sánchez i Ortega