ATHENS, April 3 (Xinhua) -- For the seventh year running, more than 100 producers from across Greece gathered here this weekend to promote the nutritional value of Greece's traditional "liquid gold," and exchange views on the challenges of production in times of crisis, innovation, and future prospects. Under the auspices of the agriculture and food ministry, cultivators displayed a rich variety of olives and olive oil and offered lectures on olive-related knowledges, while 40 chefs prepared ...