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In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: The Oregon State Capitol is home to both branches of the state legislature, the House and Senate, and has offices for the governor, treasurer, and the secretary of state. In its center, the floor of the prominent rotunda features an embedded Oregon State Seal sculpted in bronze by Ulric Ellerhusen. Ellerhusen also sculpted the Oregon Pioneer that rests atop the capitol dome's exterior. The dome rises 106 feet (32 m) above the state seal. The interior of the dome was painted by Frank H. Schwarz and features 33 stars, symbolizing Oregon's place as the 33rd state to join the Union. Eight medallions are painted near the top of the walls of the rotunda that represent the eight objects in the state seal. Also encircling the interior of the rotunda are four murals depicting moments from Oregon history. One mural depicts Captain Robert Gray's exploration of the Columbia River in 1792, another shows the Lewis and Clark Expedition, and two others portray covered wagons from pioneer times. These four murals were painted by Schwarz and Barry Faulkner. Other murals include the Provisional Government of Oregon's salmon and wheat seal, the Oregon Territory's seal, and depictions of Oregon's industries, all located in the rotunda's wings along the grand staircase. The capitol's galleria area on the first floor includes hearing rooms, display cases, and the visitor information area.Oregon's House chamber floor is covered with a custom carpet; the carpet's pattern incorporates a depiction of the state tree, the Douglas-fir, representative of forestry. The furniture and paneling of the chamber is made of golden oak. A large mural painted by Faulkner, depicting the 1843 Champoeg Meetings at which the provisional government was formed, is behind the desk of the Speaker of the House. The Senate chambers use black walnut for the paneling and furniture. Another custom carpet lines the floor, featuring Chinook salmon and wheat, representative of fishing and agriculture. The Senate's large mural was painted by Schwarz and depicts a street scene showing news of statehood reaching Salem. Lining the walls of both chambers are 158 names, inscribed in friezes, of prominent people in Oregon's history. On the second floor of the capitol is the Governor's suite, consisting of a ceremonial office and private offices for the state's chief executive. As in the Senate chamber, the paneling is of black walnut. The ceremonial office includes a fireplace with a painting by Faulkner. In the suite's reception area is a table made of 40 tree species. This table is inlaid with a replica of Oregon's second capitol building, the state flower (Oregon-grape), and the state bird (western meadowlark).
Output:
What were the first names of the people who painted the four murals of Oregon history in the rotunda?