Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Problem:Passage: During World War II, Richmond developed rapidly as a heavy industrial town, chiefly devoted to shipbuilding. Its major activity now is as a seaport, with 26 million tons of goods shipped through Port Richmond in 1993, mostly oil and petroleum products. Chevron USA has a major oil refinery in the city, with a storage capacity of 15 million barrels (2,400 m). The Social Security Administration employs over 1,000 at its regional office and program service center in Downtown Richmond. Kaiser Permanente's Richmond Medical Center hospital in the Downtown Richmond is one of the largest employers in the city. Galaxy Desserts is run and operated in the city. Vetrazzo, an award-winning green business that manufactures Recycled Glass Countertops out of waste glass such as beer bottles and old traffic lights, is located in the refurbished Ford Assembly Plant. Treeskunk Productions a video game animation studio is based in the town. Bay View recording studios are located in the city, and have worked with artists such as Smash Mouth. Photon Films, LLC, a video production and editing studio, is located in Harborfront area along the southeast shoreline.
 Link Information: The port was constructed in the 1980s Question: When was the port at Port Richmond constructed?
Solution:
Answer: the 1980s