LINCOLN, Neb. (AP) – Opponents of a proposed pipeline that would carry Canadian tar sands oil through Nebraska on its way refineries near the Gulf of Mexico are holding a series of events to draw attention to the plan.  The Stand with Randy series begins Friday and continues through Sunday in Nebraska.  The event’s website lists 24 events, including book drives, talks, a bike ride, poetry readings and concerts.  Most events are in Lincoln.  The series is named for Merrick County farmer Randy Thompson, who’s opposed to TransCanada’s Keystone XL project.  Environmental groups have raised concerns that the pipeline could foul water supplies and increase pollution.  The pipeline is designed to carry oil from Canada across Montana, South Dakota, Nebraska, Kansas, Oklahoma and Texas.