Complex sentence: It was uncovered during a series of excavations by R.A.S. Macalister in the 1920s, Kathleen Kenyon in the 1960s, and Yigael Yadin in the 1970s--80s.
Split into simpler sentences: It was uncovered during a series of excavations by R.A.S. Macalister in the 1920s. Work continued with Kathleen Kenyon in the 1960s, and Yigael Yadin in the 1970s--80s.