71. Задайте специальные вопросы. Who is she? She is Oleg's grandmother.
1. ... He is Olga's father.
2. ... They are Stepan's sisters.
3. She is Vera's mother.
4. ... I am Lena's brother.
5. ... We are Anton's friends.

1. Who is he? (Кто он?)

2. Who are they? (Кто они?)

3. Who is she? (Кто она?)

4. Who are you? (Кто ты?) / Who am I? (Кто я?)

5. Who are you? (Кто вы?) / Who are we? (Кто мы?)

1. Who is he? He is Olga's father.
To ask a special question, we can use the question word "who" to inquire about the identity of a person. In this case, we want to know the identity of the person who is Olga's father.

2. Who are they? They are Stepan's sisters.
Again, using the question word "who," we are asking about the identity of the people who are Stepan's sisters.

3. Who is she? She is Vera's mother.
Once more, by using the question word "who," we are asking about the identity of the person who is Vera's mother.

4. Who am I? I am Lena's brother.
Using the question word "who," we are asking about the speaker's identity, in this case, Lena's brother.

5. Who are we? We are Anton's friends.
Lastly, by using the question word "who," we are asking about the identity of the people who are Anton's friends.

In these examples, we can see that the special questions are formed by using the question word "who" followed by the appropriate verb conjugation and the possessive noun indicating the relationship between the people mentioned in the original statement. By asking these questions, we seek to determine the specific individuals or relationships mentioned in the initial statements.