In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Passage: After the Southwest became part of the U.S., explorers continued to look for good east–west routes along the 35th parallel. In 1853, a crew led by U.S. Army Lieutenant Amiel Whipple surveyed along a sandy wash in the northern part of the Petrified Forest. So impressed was Whipple by the petrified wood along the banks of the arroyo that he named it Lithodendron Creek (Stone Tree Creek). Geologist Jules Marcou, a member of the Whipple expedition, observed that the petrified trees were from the Triassic.A slightly later route along the parallel was a wagon road, built between 1857 and 1860, that involved experimental use of camels as transport. In the late 19th century, settlers and private stagecoach companies followed similar east–west routes. Homesteaders who stayed in the area developed cattle ranches on the grasslands, and cattle grazed in the Petrified Forest until the mid-20th century.Also close to the 35th parallel was the Atlantic and Pacific Railroad. Its opening in the early 1880s led to the founding of towns like Holbrook and Adamana. Visitors could stop at the Adamana train station, book a hotel room, and take a tour of what was then called the Chalcedony Forest. Over the years, the line changed hands, becoming the Atchison, Topeka and Santa Fe Railway, and then the BNSF. More than 60 BNSF trains, mostly carrying freight, pass through the park every day. U.S. Route 66, a former transcontinental auto highway developed in 1926 from part of the National Old Trails Road, ran parallel to the railroad tracks until it was decommissioned in 1985. The park has preserved within its boundaries a small grassy section of the road. Interstate 40, which crosses the park, replaced the older highway. 
Question: What is the name of the place that 60 BNSF trains pass through everyday?
Petrified Forest.

Passage: After their HIV positive mother's death, Derick and Margaret collect wood and construct a human-length box with wheels. Then, they journey with it from Kampala to Kasangombe in a heartbreaking bid to overcome poverty and experience hope. The journey throws them dangerous experiences on unpredictable Ugandan roads. Their mother's dying wish had set them off on a seemingly impossible journey to find a relative they do not even know.
Before her death, she leaves them an envelope addressed to her sister (their auntie) who is married to a hard-working man living in a distant village called Kasangombe with their kids. Ingeniously, Derick creates a coffin using wood he collected from a rubbish dump and adds luggage bag rollers brought by Margaret. On their journey from Kampala City to their aunt's place, they are offered a lift by a seemingly kind man (played by Joel Okuyo Atiku) in a truck who is amazed by their "box". He introduces them to a kid he had taken under his wings relaxing at the back and shows them a photo of a house they can possess if they work for him. At night though, Margaret sees a scary dream where their helper is not exactly as kind as he seemed so she runs out of the truck. Derick follows and the boy throws out their coffin before waving. They walk the rest of the distance.
Initially, their uncle (played by Isaac Muwawu) did not want them in his house because he thought they were HIV-infected. Derick overheard him quarrel with his aunt at night and shook Margaret in the morning from another dream (this time beautiful, where both siblings were smiling and enjoying a picnic in a glorious garden with their aunt, uncle, cousins, dead parents and some whites). Derick convinced her to walk away from the home with him but without a reason. 
Question: How do the pair of siblings finish the last leg of their journey?
They walk.

Passage: The Bertin portrait has been hugely influential. At first it served as a model for depictions of energetic and intellectual 19th-century men, and later as a more universal type. Several 1890s works closely echo its form and motifs. Jean-Joseph Benjamin-Constant's monochrome and severe 1896 Portrait of Alfred Chauchard is heavily indebted, while Léon Bonnat's stern 1892 portrait of the aging Ernest Renan has been described as a "direct citation" of Ingres' portrait.
Its influence can be seen in the dismissive stare and overwhelming physical presence of the sitter in Pablo Picasso's 1906 Portrait of Gertrude Stein. Picasso admired Ingres and referred to him throughout his career. His invoking of Bertin can be read as a humorous reference to, according to Robert Rosenblum, "Stein's ponderous bulk and sexual preference". Stein does not possess Bertin's ironic stare, but is similarly dressed in black, and leans forward in an imposing manner, the painting emphasising her "massive, monumental presence". In 1907 the Swiss artist Félix Vallotton depicted Stein, in response to Picasso, making an even more direct reference to Ingres' portrait, prompting Édouard Vuillard to exclaim, "That's Madame Bertin!"The influence continued through the 20th century. Gerald Kelly recalled Bertin when painting his restless and confined series of portraits of Ralph Vaughan Williams between 1952 and 1961. In 1975 Marcel Broodthaers produced a series of nine black and white photographs on board based on Ingres' portraits of Bertin and Mademoiselle Caroline Rivière. 
Question: What is the full name of the person whose invoking of Bertin can be read as a humorous reference to "Stein's ponderous bulk and sexual preference"?

Pablo Picasso.