Task: Explanation
Input (English): Tybalt is the main antagonist in William Shakespeare's play "Romeo and Juliet". He is the son of Lady Capulet's brother, Juliet's short-tempered first cousin, and Romeo's rival. Tybalt shares the same name as the character Tibert/Tybalt the "Prince of Cats" in "Reynard the Fox", a point of mockery in the play. Mercutio repeatedly calls Tybalt "Prince of Cats" (perhaps referring not only to Reynard but to the Italian word cazzo as well). Luigi da Porto adapted the story as "Giulietta e Romeo" and included it in his "Historia novellamente ritrovata di due Nobili Amanti" published in 1530. Da Porto drew on "Pyramus and Thisbe" and Giovanni Boccaccio's "Decameron". He gave it much of its modern form, including the lovers' names, the rival families of Montecchi and Capuleti, and the location in Verona. He also introduces characters corresponding to Shakespeare's Mercutio, Tybalt, and Paris. Da Porto presents his tale as historically true and claims it took place in the days of Bartolomeo II della Scala (a century earlier than Salernitano). Montague and Capulet were actual 13th-century political factions, but the only connection between them is a mention in Dante's" Purgatorio" as an example of civil dissension. Question: What is the name of the main antagonist, son of Lady Capulet's brother and who was slain in a duel by Romeo Montague? Answer: Tybalt
Output (English):  He is the son of Lady Capulets brother, Juliets shorttempered first cousin, and Romeos rival.