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Sneed's forced fumble, McCaffrey's touchdown among the plays that
Yellow Line
How Do Networks Show the First-Down Line on Televised Football Games?
How do they make the first down line appear on the football field
The Story Behind the NFL's Magic Yellow First-Down Line - Insight
History of Augmented Reality - svarmony
Everything is on the line (actually, on the offensive and defensive lines of the Chiefs and Eagles) in the Super Bowl - The Boston Globe
How do they superimpose the first-down line onto the field on
The Yellow Line - that won an Emmy - by Guy Boggan
Just How Does That Yellow First Down Line Work?