You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

For four years we have waited expectantly for the pitter patter of tiny paws. Soon, that wait could finally be over. Tian Tian, the UK's only female giant panda, has conceived and could give birth to a cub as early as August. However Edinburgh Zoo, where the pandas live, have warned people 'not to get too excited' as the process is 'extremely complex'. Moreover, on the two previous occasions keepers inseminated Tian Tian - whose name means 'Sweetie' - she has failed to produce a panda cub. She was artificially inseminated again in March this year, but keepers at the zoo say implantation - when a fertilised egg attaches to the uterus - has not yet occurred.Tian Tian has conceived and could give birth to a cub as early as AugustShe has been inseminated twice before but so far failed to produce a cubTian Tian and Yang Guang arrived in 2011 from China to great fanfareOn loan at £600k a year, became first giant pandas to live in UK for 17 years 
 Questions:Under the terms of the agreement any cubs will return to _ at the age of two, the age at which they would normally leave their mother in the wild. (A) Tian Tian (B) UK (C) Edinburgh Zoo (D) Sweetie (E) Yang Guang (F) China
Solution: (F)
Why? This is a good example. Based on the passage, any cubs will return to China at the age of two

New input: (CNN) Thursday's attack in Dallas provides a reminder that violent extremism and terrorist attacks are not the province of any one ideology. Instead, political violence has a long history in the United States and not just from people drawn to Osama bin Laden and his successors' vision of global jihad. The suspected Dallas sniper who killed five police officers has been identified as Micah Xavier Johnson, a 25-year-old from Mesquite, Texas. The Dallas shootings, like the one carried out last year by Dylann Roof on a black church in Charleston, South Carolina, that left nine people dead, were politically motivated.Dallas attack seemingly first instance of deadly terrorism from extreme left in post-9/11 era, Peter Bergen and David Sterman sayDallas a reminder violent extremism isn't province of any one ideology, they say 
 Questions:Killing white police officers who are guarding a peaceful demonstration certainly qualifies as terrorism, in the same way that _'s attack on black churchgoers does. (A) CNN (B) Dallas (C) United States (D) Osama bin Laden (E) Micah Xavier Johnson (F) Mesquite (G) Texas (H) Dylann Roof (I) Charleston (J) South Carolina (K) Peter Bergen (L) David Sterman
Solution:
(H)