The Plaza might not have played as prominent a role in my development as it did in Fitzgerald's, but for anyone who's lived in this city long enough it's always served as a glamorous demarcation line dividing uptown from downtown.

WSJ: Gatsby Slept Here

"As an educator, there is a line of demarcation between you and your student, " Keith said.

CNN: Online student-teacher friendships can be tricky

Sky and water become the focal elements, always expanding, while the buildings become simply a line of demarcation between them.

WSJ: Appreciating Francesco Guardi's Changing Genres/ A Guardi Retropsective at Museo Correr in Venice

But that year marked a stark line of demarcation in the sport's evolution, as Gola and the Explorers lost to the University of San Francisco and its star, Bill Russell.

WSJ: Why La Salle Basketball Matters

This is part of a wider debate on the blurring demarcation line between public and private responsibilities and how far a legal right for citizens to get access to information can intrude into the private sector.

BBC: A Big Mac with extra FOIs, please

In order to better connect with both employees and customers, corporations of all sizes will increasingly seek to identify themselves with a single, popular cause, blurring the line of demarcation between social enterprises and traditional businesses.

FORBES: Social Entrepreneurship Predictions for 2013