Task: Question Generation
Input (English): Passage: Multnomah County is named for Native Americans who lived in the area before settlement by non-indigenous people in the 19th century. Members of the Multnomah tribe of the Chinookan people lived on Sauvie Island in the Willamette River and on the mainland across from the island, downstream from the mouth of Balch Creek. Much of the area near the lower creek was swampy, and was not favored by the Multnomah. By the 1830s, diseases carried by white explorers and traders reduced the native population by up to 90 percent in the lower Columbia basin.Historic Guild's Lake, in the lower Balch Creek watershed near the Willamette River, was named for Peter Guild (pronounced guile), one of the first European American settlers in the area. In 1847, he acquired nearly 600 acres (2.4 km2) of the watershed through a donation land claim. Although variations in the spelling of Guild's Lake occur in historic newspapers, maps, and other documents, Guild's Lake has been the preferred form since the beginning of the 20th century.The creek is named for Danford Balch, who settled a 346-acre (1.40 km2) donation land claim upstream of the Guild property in 1850. After a man from a neighboring family eloped with a Balch daughter, Balch killed him with a shotgun. On October 17, 1859, at a public gallows he became the first person to be hanged by the State of Oregon.Macleay Park takes its name from Donald Macleay, a Portland merchant and real-estate developer who  acquired what had been the Balch property. In 1897, he donated the land for a park on condition that the city provide transport to the park for hospital patients and build paths wide enough for wheelchairs.
Output (English): What is the first name of the person whose property Macleay acquired?