<http://schema.org/description>
"On Saturday,the world's largest tunnel boring machine was dedicated in the city of Seattle. \u201CBertha,\u201D as it\u2019s known, will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the city to replace a viaduct damaged in a 2001 earthquake. Gizmag took a look inside the giant machine."^^<http://www.w3.org/2001/XMLSchema#string>
<http://newatlas.com/worlds-largest-drilling-machine-bertha/28311/>