6 5 2 0

person1 Person
person2 Person
city1 City
city2 City
country1 Country
country2 Country

a person1 city1 isLocatedIn
b person2 city2 isLocatedIn
c person1 person2 knows
d city1 country1 isPartOf
e city2 country2 isPartOf

country1 name ='Afghanistan'
country2 name ='India'