source: As the largest sub-region in Mesoamerica it is a vast and varied landscape from the mountainous regions of the Sierra Madre to the plains of Yucatan.
target: The largest sub-region in Mesoamerica, its landscape was vast and varied, from the Sierra Madre mountains to the Northern Yucatan plains.
references: The largest sub-region in Mesoamerica, its landscape was vast and varied, from the Sierra Madre mountains to the Northern Yucatan plains. As the largest sub-region in Mesoamerica, it encompassed a vast and varied landscape, from the mountainous regions of the Sierra Madre to the semi-arid plains of northern Yucatán. As the largest sub-region in Mesoamerica, it had a vast and varied landscape, from the mountainous regions of the Sierra Madre to the semi-arid plains of northern Yucatán. As the largest part of the whole in Mesoamerica, it includes a large and changing landscape, from the mountain areas of Sierra Madre to the dry plains of northern Yucatan. It was the largest sub-region in Mesoamerica and covered a large and varied landscape, from the mountainous regions of the Sierra Madre to the semi-arid plains of northern Yucatán. As the largest sub-region in Mesoamerica, it encompassed a vast and varied landscape, from the mountainous regions of the Sierra Madre to the semi-arid plains of northern Yucatán. Asthe largest sub-region in Mesoamerica, it surounds a vast and different landscape, from the mountainous regions of the Sierra Madre to the semi-arid plains of northern Yucatan.