Complex sentence: It was discovered in 1948 and in the subsequent years was sporadically examined by Alan Rowe and Labib Habachi, between 1994 and 2001 extensive excavations were undertaken by a University of Liverpool under the direction of Steven Snape.
Split into simpler sentences: It was discovered in 1948 and in the subsequent years was sporadically examined by Alan Rowe and Labib Habachi. Since 1994 a extensive excavations have been undertaken at the site by a team from the University of Liverpool under the direction of Steven Snape.