Question: How close is Wrigley Field to the lake where the city where Ralph Helfer was born gets its drinking water from?

full_context: Document 1: Richmond, Virginia: The wastewater treatment plant and distribution system of water mains, pumping stations and storage facilities provide water to approximately 62,000 customers in the city. There is also a wastewater treatment plant located on the south bank of the James River. This plant can treat up to 70 million gallons of water per day of sanitary sewage and stormwater before returning it to the river. The wastewater utility also operates and maintains 1,500 miles (2,400 km) of sanitary sewer and pumping stations, 38 miles (61 km) of intercepting sewer lines, and the Shockoe Retention Basin, a 44-million-gallon stormwater reservoir used during heavy rains.
Document 2: Ralph Helfer: Ralph Helfer (born April 9, 1931 in Chicago, Illinois) is a notable American animal behaviorist, creator of Marine World/Africa USA, and writer of books about animals.
Document 3: Miami: Beneath the plain lies the Biscayne Aquifer, a natural underground source of fresh water that extends from southern Palm Beach County to Florida Bay, with its highest point peaking around the cities of Miami Springs and Hialeah. Most of the Miami metropolitan area obtains its drinking water from this aquifer. As a result of the aquifer, it is not possible to dig more than 15 to 20 ft (5 to 6 m) beneath the city without hitting water, which impedes underground construction, though some underground parking garages exist. For this reason, the mass transit systems in and around Miami are elevated or at-grade.[citation needed]
Document 4: Water cribs in Chicago: The water cribs in Chicago are structures built to house and protect offshore water intakes used to supply the City of Chicago with drinking water from Lake Michigan. Water is collected and transported through tunnels located close to 200 feet beneath the lake, varying in shape from circular to oval, and ranging in diameter from 10 to 20 feet. The tunnels lead from the cribs to one of two water purification plants located onshore, the Jardine Water Purification Plant (the world's largest) and the Eugene Sawyer Water Purification Plant, where the water is then treated before being pumped to all parts of the city as well as 118 suburbs.
Document 5: Wrigley Field: In April and May the wind often comes off Lake Michigan (less than a mile to the east), which means a northeast wind ``blowing in ''to knock down potential home runs and turn them into outs. In the summer, however, or on any warm and breezy day, the wind often comes from the south and the southwest, which means the wind is`` blowing out'' and has the potential to turn normally harmless fly balls into home runs. A third variety is the cross-wind, which typically runs from the left field corner to the right field corner and causes all sorts of havoc. Depending on the direction of the wind, Wrigley can either be one of the friendliest parks in the major leagues for pitchers or among the worst. This makes Wrigley one of the most unpredictable parks in the Major Leagues.
Document 6: Wind power in Iowa: Wind farms are most prevalent in the north and west portion of Iowa. Wind maps show the winds in these areas to be stronger on average, making them better suited for the development of wind energy. Average wind speeds are not consistent from month to month. Wind maps show wind speeds are on average strongest from November through April, peaking in March. August is the month with the weakest average wind speeds. On a daily cycle, there is a slight rise in average wind speeds in the afternoon, from 1 to 6 p.m. Estimates by the National Renewable Energy Laboratory (NREL) indicate Iowa has potentially 570,700 Megawatts of wind power using large turbines mounted on 80 meter towers. Iowa ranks seventh in the country in terms of wind energy generation potential due to the strong average wind speeds in the midsection of the U.S. The Iowa Environmental Mesonet distributes current weather and wind conditions from approximately 450 monitoring stations across Iowa, providing data for modelling and predicting wind power.
Document 7: Wind direction: Wind direction is reported by the direction from which it originates. For example, a northerly wind blows from the north to the south. Wind direction is usually reported in cardinal directions or in azimuth degrees. Wind direction is measured in degrees clockwise from due north. Consequently, a wind blowing from the north has a wind direction of 0 °; a wind blowing from the east has a wind direction of 90 °; a wind blowing from the south has a wind direction of 180 °; and a wind blowing from the west has a wind direction of 270 °. In general, wind directions are measured in units from 0 ° to 360 °, but can alternatively be expressed from - 180 ° to 180 °.
Document 8: Ralph L. Brinster: Ralph Lawrence Brinster is an American geneticist and Richard King Mellon Professor of Reproductive Physiology at the School of Veterinary Medicine, University of Pennsylvania.
Document 9: Chicago Cubs: Located in Chicago's Lake View neighborhood, Wrigley Field sits on an irregular block bounded by Clark and Addison Streets and Waveland and Sheffield Avenues. The area surrounding the ballpark is typically referred to as Wrigleyville. There is a dense collection of sports bars and restaurants in the area, most with baseball inspired themes, including Sluggers, Murphy's Bleachers and The Cubby Bear. Many of the apartment buildings surrounding Wrigley Field on Waveland and Sheffield Avenues have built bleachers on their rooftops for fans to view games and other sell space for advertisement. One building on Sheffield Avenue has a sign atop its roof which says "Eamus Catuli!" which is Latin for "Let's Go Cubs!" and another chronicles the time since the last Division title, pennant, and World Series championship. The 02 denotes two years since the 2008 NL Central title, 65 years since the 1945 pennant and 102 years since the 1908 World Series championship. On game days, many residents rent out their yards and driveways to people looking for parking spots. The uniqueness of the neighborhood itself has ingrained itself into the culture of the Chicago Cubs as well as the Wrigleyville neighborhood, and has led to being used for concerts and other sporting events, such as the 2010 NHL Winter Classic between the Chicago Blackhawks and Detroit Red Wings, as well as a 2010 NCAA men's football game between the Northwestern Wildcats and Illinois Fighting Illini.
Document 10: Ralph Greenleaf: Ralph Greenleaf (November 3, 1899 in Monmouth, Illinois – March 15, 1950 in Philadelphia, Pennsylvania) was an American professional pool and carom billiards player, a twenty-time World Pocket Billiards Champion, whose ability and charisma dominated the sport during his heyday.
Document 11: Water supply and sanitation in London: London has well developed water supply infrastructure. Most drinking water consumed in London comes from the River Thames and the River Lee. Approximately 70% of all water supplied to London is taken from the Thames upstream of Teddington Weir.
Document 12: John L. Behler: John L. Behler (1946 – January 31, 2006) was an American naturalist, herpetologist, author, and activist known for his work in conserving endangered species of turtles, snakes, and other reptiles. He served as curator of herpetology at the Bronx Zoo, part of the Wildlife Conservation Society from 1976 to 2006. He co-chaired the IUCN Tortoise and Freshwater Turtle Specialist Group, and was a founding member of the Turtle Survival Alliance, which co-present the Behler Turtle Conservation Award with the Turtle Conservancy and Turtle Conservation Fund. The Behler Turtle Conservation Award is a major annual award to honor leadership in the field of freshwater turtle and tortoise conservation. The Turtle Conservancy named its captive breeding center, the Behler Chelonian Center, in his honor.
Document 13: Henry Spira: Henry Spira (19 June 1927 – 12 September 1998) was a Belgian-American animal rights advocate, regarded by some as one of the most effective animal advocates of the 20th century.
Document 14: Cape Doctor: Although the wind blows over a wide area of the Western Cape Province, it is notorious especially in and around the Cape Peninsula, where it can be unpleasantly strong and irritating. Capetonians also call it "the South-Easter".
Document 15: Philadelphia: Historically, Philadelphia sourced its water by the Fairmount Water Works, the nation's first major urban water supply system. In 1909, Water Works was decommissioned as the city transitioned to modern sand filtration methods. Today, the Philadelphia Water Department (PWD) provides drinking water, wastewater collection, and stormwater services for Philadelphia, as well as surrounding counties. PWD draws about 57 percent of its drinking water from the Delaware River and the balance from the Schuylkill River. The public wastewater system consists of three water pollution control plants, 21 pumping stations, and about 3,657 miles of sewers. A 2007 investigation by the Environmental Protection Agency found elevated levels of Iodine-131 in the city's potable water.[citation needed] In 2012, the EPA's readings discovered that the city had the highest readings of I-131 in the nation. The city campaigned against an Associated Press report that the high levels of I-131 were the results of local gas drilling in the Upper Delaware River.[citation needed]
ground_truth: less than a mile to the east
sub_queries: What is Ralph Helfer's birthplace? Answer: Chicago
where does Chicago get its drinking water from Answer: Lake Michigan
how close is wrigley field to Lake Michigan Answer: less than a mile to the east