Instructions: 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'.
Input: Context: During the rule of the Sena Dynasty, in the 11th-12th century, Gauda was rebuilt and extended as Lakshmanawati (later Lakhnauti), and it became the hub of the Sena empire Link Information: . Ballala Sena conquered Gaur from the Pala, became the ruler of the Bengal Delta, Question: Who ruled the Gupta Empire when Gauda was rebuilt and became the hub of the Sena Empire?
Output:
Answer: Ballala Sena