Detailed Instructions: Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
Problem:Paragraph- Sent 1: The series starts in Baghdad at an undetermined time .
Sent 2: The Sultan Shahryar has gone mad after accidentally killing his wife during a failed coup d' tat , Which she had planned with Shahryar's brother Schahzenan .
Sent 3: In his madness , Shahryar believes that all women now want to kill him , but the law states that the Sultan must be married again or the throne will be passed to his brother .
Sent 4: Shahryar therefore orders Grand Vizier Ja'Far ( ( ( Jim Carter to bring him a harem girl to marry and then have executed the next day .
Sent 5: In order to prevent this , the Grand Vizier's clever daughter , Scheherazade , decides to marry the Sultan herself .
Sent 6: Scheherazade has a plan to prevent her execution and at the same time cure the Sultan of his madness .
Sent 7: With the help of some tutoring from a bazaar storyteller , Scheherazade tells the Sultan a story every night , stopping at dawn with a cliffhanger and refusing to continue until dusk .
Sent 8: Shahryar must therefore let Scheherazade live for another day in order to hear the rest of the story .
Sent 9: Cunningly , Scheherazade has hidden a moral within every story , to bring the Sultan out of his madness .
Sent 10: Meanwhile , Schahzenan hears about the Sultan's madness and that he is unable to execute Scheherazade .
Sent 11: Perceiving this as weakness , Schahzenan leads his army to Baghdad in an attempt to take the throne by force .
Sent 12: However , by the time Schahzenan's army reaches the city , Scheherazade's plan has worked .
Sent 13: As a result of her stories , Shahryar has overcome his madness and has fallen in love with Scheherazade . 
Question: What makes Schahzenan lead his army to Baghdad?.
Solution:
Wanting the throne.