Question:
Which political party did Lennart Meri belong to in May, 1998?

Context:
 Lennart Meri is a member of the Popular Front of Estonia from Jan, 1988 to Jan, 1991. 
 Lennart Meri is a member of the National Coalition Party Pro Patria from Jan, 1992 to Jan, 1995. 
 Lennart Meri is a member of the Pro Patria Union from Jan, 1995 to Jan, 2006.

Answer:
Question:
Which political party did Lennart Meri belong to in May, 1998?

Context:
 Lennart Meri is a member of the Popular Front of Estonia from Jan, 1988 to Jan, 1991. 
 Lennart Meri is a member of the National Coalition Party Pro Patria from Jan, 1992 to Jan, 1995. 
 Lennart Meri is a member of the Pro Patria Union from Jan, 1995 to Jan, 2006.

Answer:
user
Pro Patria Union
assistant
Question:
Which political party did Lennart Meri belong to in May, 1998?

Context:
 Lennart Meri is a member of the Popular Front of Estonia from Jan, 1988 to Jan, 1991. 
 Lennart Meri is a member of the National Coalition Party Pro Patria from Jan, 1992 to Jan, 1995. 
 Lennart Meri is a member of the Pro Patria Union from Jan, 1995 to Jan, 2006.

Answer:
user
Popular Front of Estonia
National Coalition Party Pro Patria
assistant
Question:
Which political party did Lennart Meri belong to in May, 1998?

Context:
 Lennart Meri is a member of the Popular Front of Estonia from Jan, 1988 to Jan, 1991. 
 Lennart Meri is a member of the National Coalition Party Pro Patria from Jan, 1992 to Jan, 1995. 
 Lennart Meri is a member of the Pro Patria Union from Jan, 1995 to Jan, 2006.

Answer:
user
Pro Patria Union
assistant