sentence1: Although the ruins were investigated by Samuel Alejandro Lafone Quevedo in 1888 , they were first discovered in 1897 by the archaeologist Juan Bautista Ambrosetti .
sentence2: Although the ruins were discovered by Samuel Alejandro Lafone Quevedo in 1888 , they were first investigated in 1897 by the archaeologist Juan Bautista Ambrosetti .