<http://schema.org/description>
"Bertha, the world\u2019s largest tunnel boring machine (TBM), started digging under Seattle on Tuesday as it chewed through the north wall of the 80-ft (24.3 m) deep trench where it was assembled after being shipped in pieces from its manufacturer in Japan."^^<http://www.w3.org/2001/XMLSchema#string>
<http://newatlas.com/bertha-worlds-largest-tunnel-machine-seattle/28540/>