ความจุใดมี School of windlehurst school และ Ofsted เล็กกว่า 131889
Which Capacity has a School of windlehurst school, and an Ofsted smaller than 131889?
df = pd.DataFrame(columns=['capacity', 'school', 'ofsted'])
df[(df['school'] == 'windlehurst school') & (df['ofsted'] < '131889')]['capacity'].sum()