In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Ex Input:
Passage: The second largest February tornado outbreak on record impacted the Gulf Coast and East Coast regions of the United States beginning on February 23. The first significant tornadoes of the outbreak moved across southeastern Louisiana and southern Mississippi that evening, leaving significant damage and three deaths. The towns of Livingston and Laplace, Louisiana sustained heavy damage from strong EF2 tornadoes, and another EF2 near Purvis, Mississippi killed one person in a mobile home. An EF3 tornado also caused major structural damage in Paincourtville, Louisiana before destroying an RV park in Convent, killing two people at that location. Three simultaneous waterspouts were observed over Lake Pontchartrain during the event as well. Later that night, a large supercell thunderstorm developed over the Gulf of Mexico and moved ashore, producing a destructive EF3 tornado in Pensacola, Florida. The tornado injured three people and destroyed homes, townhouses, apartments, and a GE warehouse.
 Link Information: Lake Pontchartrain ( ; , ) is a brackish estuary located in southeastern Louisiana in the United States. It covers an area of 630 sqmi Answer: 17563392000

Ex Output:
What is the square footage of the lake over which three simultaneous waterspouts were observed during the tornado outbreak that began on February 23rd?


Ex Input:
Passage: In 2009 it was announced that the feature film Testament of Youth was in development by BBC Films and Heyday Films producer David Heyman, and was to be directed by James Kent. This had the support of the Vera Brittain Estate, Brittain's daughter Shirley Williams, and Brittain's biographer Mark Bostridge who is acting as consultant. Saoirse Ronan was cast to play Brittain in 2012 but was replaced in December 2013 when it was announced that Alicia Vikander would play Vera Brittain in the film which was released in late 2014 as part of the First World War commemorations. On 4 February 2014 Kit Harington joined the cast to play the role of Brittain's fiancé Roland Leighton. On 13 February 2014, Colin Morgan, Taron Egerton, and Alexandra Roach were announced to have joined the film's cast. An ensemble cast was later confirmed as filming began, including Dominic West, Emily Watson, Joanna Scanlan, Hayley Atwell, Jonathan Bailey and Anna Chancellor. It substituted Merton College, Oxford in the scenes showing Brittain's time as a student at Somerville College, arguing that filming in Somerville itself would been too difficult in light of the new buildings constructed there since the film's time period.
 Link Information: none Answer: none

Ex Output:
Why was Saoirse Ronan replaced by Alicia Vikander?


Ex Input:
Passage: Bricher was born in Portsmouth, New Hampshire. He was educated in an academy at Newburyport, Massachusetts. He began his career as a businessman in Boston, Massachusetts. When not working, he studied at the Lowell Institute. He also studied with Albert Bierstadt, William Morris Hunt, and others. He attained noteworthy skill in making landscape studies from nature, and after 1858 devoted himself to the art as a profession. He opened a studio in Boston, and met with some success there. In 1868 he moved to New York City, and at the National Academy of Design that year he exhibited “Mill-Stream at Newburyport.” Soon afterward he began to use watercolors in preference to oils, and in 1873 was chosen a member of the American Watercolor Society. In the 1870s, he primarily did maritime themed paintings, with attention to watercolor paintings of landscape, marine, and coastwise scenery. He often spent summers in Grand Manan, where he produced such notable works as Morning at Grand Manan (1878). In 1879, Bricher was elected into the National Academy of Design as an Associate member.
 Link Information: In 2016, Boston was estimated to have 673,184 residents Answer: 673,184

Ex Output:

What is the current population of the city where Bricher began his career as a businessman?