In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: Tibet's incursions into Sichuan can be classified as what during the Tang Dynasty?, Context: Sichuan came under the firm control of a Chinese central government during the Sui dynasty, but it was during the subsequent Tang dynasty where Sichuan regained its previous political and cultural prominence for which it was known during the Han. Chengdu became nationally known as a supplier of armies and the home of Du Fu, who is sometimes called China's greatest poet. During the An Lushan Rebellion (755-763), Emperor Xuanzong of Tang fled from Chang'an to Sichuan. The region was torn by constant warfare and economic distress as it was besieged by the Tibetan Empire.
[A]: constant

[Q]: what name start with S?, Context: On 13 December 1904, Hungarian Sandor Just and Croatian Franjo Hanaman were granted a Hungarian patent (No. 34541) for a tungsten filament lamp that lasted longer and gave brighter light than the carbon filament. Tungsten filament lamps were first marketed by the Hungarian company Tungsram in 1904. This type is often called Tungsram-bulbs in many European countries. Filling a bulb with an inert gas such as argon or nitrogen retards the evaporation of the tungsten filament compared to operating it in a vacuum. This allows for greater temperatures and therefore greater efficacy with less reduction in filament life.
[A]: Sandor

[Q]: What did Richie have to do before marrying Madonna, Context: She met director Guy Ritchie, who would become her second husband, in November 1998 and gave birth to their son Rocco John Ritchie on August 11, 2000 in Los Angeles. Rocco and Madonna suffered complications from the birth due to her experiencing placenta praevia. He was christened at Dornoch Cathedral in Dornoch, Scotland, on December 21, 2000. Madonna married Ritchie the following day at nearby Skibo Castle. Her fifth concert tour, titled Drowned World Tour, started in June 2001. The tour visited cities in the U.S. and Europe and was the highest-grossing concert tour of the year by a solo artist, earning $75 million from 47 sold-out shows. She also released her second greatest-hits collection, titled GHV2, to coincide with the home video release of the tour. GHV2 debuted at number seven on the Billboard 200.
[A]:
He was christened