Question: Which president, numerically, signed the Eastern Wilderness Areas act into law?
Sentence (from "Eastern Wilderness Act"): Built upon the 1964 Wilderness Act, which was written by Howard Zahniser of The Wilderness Society and signed into law by President Lyndon B. Johnson, the Act designated 16 new wilderness areas in the Eastern United States, including 207000 acre of wilderness on national lands in 13 states.
Relevant evidence: No