BOSTON — Former Vice President Al Gore's daughter was among 23 people arrested during a protest of a pipeline under construction.The arrests happened Wednesday at the site of Spectra Energy's West Roxbury Lateral pipeline in Boston.Karenna Gore was among demonstrators who tried to block construction activity on the site by lying in a trench dug for the pipeline and refusing to move until firefighters removed them, said protest group Resist the Pipeline & Stop the West Roxbury Lateral.The group opposes the pipeline because of safety and climate change concerns.