Teacher:In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Teacher: Now, understand the problem? Solve this instance: Context: On 12 May 1990 the leaders of the Baltic republics signed a joint declaration known as the Baltic Entente. Link Information: The Baltic Entente was based on Treaty of Good-Understanding and Co-operation signed between Lithuania, Latvia, and Estonia on September 12, 1934 in Geneva. Question: Leaders of which countries signed a joint declaration on 12 May 1990?
Student:
Answer: Lithuania, Latvia, and Estonia