They're ....
brothers
What is it?
a family
How many brothers?
Three
He is the ....
father
They're ....
sisters.
What is it?
It's a photo
How many sisters?
one
They're .....
parents
She is the ....
grandmother
How many people?
six
She is the ...
mother
He is the .....
baby
How many parents?
two
He is the ....
grandfather