Input: Article: President Abraham Lincoln visited General Grant at Petersburg on April 3, and took a launch to Richmond the next day, while Jefferson Davis attempted to organize his Confederate government at Danville. Lincoln met Confederate assistant secretary of War John A. Campbell, and handed him a note inviting Virginia's legislature to end their rebellion. After Campbell spun the note to Confederate legislators as a possible end to the Emancipation Proclamation, Lincoln rescinded his offer and ordered General Weitzel to prevent the Confederate state legislature from meeting. Union forces killed, wounded or captured 8000 Confederate troops at Saylor's Creek southwest of Petersburg on April 6. General Lee continued to reject General Grant's surrender suggestion until Sheridan's infantry and cavalry appeared in front of his retreating army on April 8. He surrendered his remaining approximately 10000 troops at Appomattox Court House the following morning. Jefferson Davis retreated to North Carolina, then further south. when Lincoln rejected the surrender terms negotiated by general Sherman and envoys of North Carolina governor Zebulon Vance, which failed to mention slavery. Davis was captured on May 10 near Irwinville, Georgia and taken back to Virginia, where he was charged with treason and imprisoned for two years at Fort Monroe until freed on bail.

Now answer this question: How many years did Davis spend in Fort Monroe?

Output: two

Input: Article: Publius Vergilius Maro (Classical Latin: [pu.bl.s wr.l.s ma.ro]; October 15, 70 BC September 21, 19 BC), usually called Virgil or Vergil /vrdl/ in English, was an ancient Roman poet of the Augustan period. He is known for three major works of Latin literature, the Eclogues (or Bucolics), the Georgics, and the epic Aeneid. A number of minor poems, collected in the Appendix Vergiliana, are sometimes attributed to him.

Now answer this question: Which collection of minor poems are sometimes attributed to Virgil?

Output: Appendix Vergiliana

Input: Article: During the summers at Nohant, particularly in the years 183943, Chopin found quiet, productive days during which he composed many works, including his Polonaise in A-flat major, Op. 53. Among the visitors to Nohant were Delacroix and the mezzo-soprano Pauline Viardot, whom Chopin had advised on piano technique and composition. Delacroix gives an account of staying at Nohant in a letter of 7 June 1842:

Now answer this question: What is the example given of a work produced by Frederic during calm summers at Nohant?

Output:
Polonaise in A-flat major, Op. 53