Question: when did Hurricane Maria make landfall in the country where groups not from the US came from in The Sing Off?

full_context: Document 1: Hurricane Maria: The storm made landfall on Puerto Rico on Wednesday, September 20 as a Category 4 hurricane with winds of 155 mph. A sustained wind of 64 mph (103 km / h) with a gust to 113 mph (182 km / h) was reported in San Juan, Puerto Rico, immediately prior to the hurricane making landfall on the island. After landfall, wind gusts of 109 mph (175 km / h) were reported at Yabucoa Harbor and 118 mph (190 km / h) at Camp Santiago. In addition, very heavy rainfall occurred throughout the territory, peaking at 37.9 in (962.7 mm) in Caguas. Widespread flooding affected San Juan, waist - deep in some areas, and numerous structures lost their roof. The coastal La Perla neighborhood of San Juan was largely destroyed. Cataño saw extensive damage, with the Juana Matos neighborhood estimated to be 80 percent destroyed. The primary airport in San Juan, the Luis Muñoz Marín International Airport, was slated to reopen on September 22.
Document 2: Hurricane Maria: Originating from a tropical wave, Maria became a tropical storm on September 16, east of the Lesser Antilles. Highly favorable environmental conditions allowed the storm to undergo explosive intensification as it approached the island arc. The hurricane reached Category 5 strength on September 18 just before making landfall on Dominica, becoming the first Category 5 hurricane on record to strike the island. After weakening slightly due to crossing Dominica, Maria achieved its peak intensity over the eastern Caribbean with maximum sustained winds of 175 mph (280 km / h) and a pressure of 908 mbar (hPa; 26.81 inHg), making it the tenth-most intense Atlantic hurricane on record. On September 20, an eyewall replacement cycle took place, weakening Maria to a high - end Category 4 hurricane by the time it struck Puerto Rico. Interaction with land further weakened the hurricane, though it regained some strength as it moved northeast of The Bahamas. Moving slowly to the north, Maria gradually degraded and weakened to a tropical storm on September 28. Embedded in the westerlies, Maria accelerated toward the east and later east - northeast over the open Atlantic, becoming extratropical on September 30 and dissipating by October 3.
Document 3: A cappella: In July 1943, as a result of the American Federation of Musicians boycott of US recording studios, the a cappella vocal group The Song Spinners had a best-seller with "Comin' In On A Wing And A Prayer". In the 1950s several recording groups, notably The Hi-Los and the Four Freshmen, introduced complex jazz harmonies to a cappella performances. The King's Singers are credited with promoting interest in small-group a cappella performances in the 1960s. In 1983 an a cappella group known as The Flying Pickets had a Christmas 'number one' in the UK with a cover of Yazoo's (known in the US as Yaz) "Only You". A cappella music attained renewed prominence from the late 1980s onward, spurred by the success of Top 40 recordings by artists such as The Manhattan Transfer, Bobby McFerrin, Huey Lewis and the News, All-4-One, The Nylons, Backstreet Boys and Boyz II Men.[citation needed]
Document 4: Hurricane Charley: After crossing Cuba near Menelao Mora, Hurricane Charley accelerated to the north - northeast, toward the southwest coast of Florida in response to the approach of an unseasonal mid-tropospheric trough. Charley passed over the Dry Tortugas at 1200 UTC on August 13, with maximum winds of about 110 mph (180 km / h). The strike occurred only 22 hours after Tropical Storm Bonnie made landfall on St. Vincent Island, marking the first time two tropical cyclones hit the same state within a 24 - hour period. Then Charley rapidly intensified, strengthening from a 110 mph (180 km / h) hurricane with a minimum central barometric pressure of 965 mbar (hPa; 28.50 inHg) to a 145 mph (233 km / h) hurricane with a pressure of 947 mbar (hPa; 27.96 inHg) in just three hours. It continued to strengthen as it turned more to the northeast, and made landfall near the island of Cayo Costa, Florida as a 150 mph (240 km / h) Category 4 hurricane with a pressure of 941 mbar (hPa; 27.79 inHg) at approximately 1945 UTC on August 13. An hour later, the hurricane struck Punta Gorda as a 145 mph (233 km / h) storm and then passed up through Port Charlotte. However, the eye had shrunk before landfall, limiting the most powerful winds to an area within 7 mi (11 km) of the center.
Document 5: A cappella: Contemporary a cappella includes many vocal groups and bands who add vocal percussion or beatboxing to create a pop/rock/gospel sound, in some cases very similar to bands with instruments. Examples of such professional groups include Straight No Chaser, Pentatonix, The House Jacks, Rockapella, Mosaic, and M-pact. There also remains a strong a cappella presence within Christian music, as some denominations purposefully do not use instruments during worship. Examples of such groups are Take 6, Glad and Acappella. Arrangements of popular music for small a cappella ensembles typically include one voice singing the lead melody, one singing a rhythmic bass line, and the remaining voices contributing chordal or polyphonic accompaniment.
Document 6: Washington University in St. Louis: Washington University has a large number of student-run musical groups on campus, including 12 official a cappella groups. The Pikers, an all-male group, is the oldest such group on campus. The Greenleafs, an all-female group is the oldest (and only) female group on campus. The Mosaic Whispers, founded in 1991, is the oldest co-ed group on campus. They have produced 9 albums and have appeared on a number of compilation albums, including Ben Folds' Ben Folds Presents: University A Cappella! The Amateurs, who also appeared on this album, is another co-ed a cappella group on campus, founded in 1991. They have recorded seven albums and toured extensively. After Dark is a co-ed a cappella group founded in 2001. It has released three albums and has won several Contemporary A Capella Recording (CARA) awards. In 2008 the group performed on MSNBC during coverage of the vice presidential debate with specially written songs about Joe Biden and Sarah Palin. The Ghost Lights, founded in 2010, is the campus's newest and only Broadway, Movies, and Television soundtrack group. They have performed multiple philanthropic concerts in the greater St. Louis area and were honored in November 2010 with the opportunity to perform for Nobel Laureate Douglass North at his birthday celebration.
Document 7: A cappella: The Swingle Singers used nonsense words to sound like instruments, but have been known to produce non-verbal versions of musical instruments. Like the other groups, examples of their music can be found on YouTube. Beatboxing, more accurately known as vocal percussion, is a technique used in a cappella music popularized by the hip-hop community, where rap is often performed a cappella also. The advent of vocal percussion added new dimensions to the a cappella genre and has become very prevalent in modern arrangements. Petra Haden used a four-track recorder to produce an a cappella version of The Who Sell Out including the instruments and fake advertisements on her album Petra Haden Sings: The Who Sell Out in 2005. Haden has also released a cappella versions of Journey's "Don't Stop Believin'", The Beach Boys' "God Only Knows" and Michael Jackson's "Thriller". In 2009, Toyota commissioned Haden to perform three songs for television commercials for the third-generation Toyota Prius, including an a cappella version of The Bellamy Brothers' 1970s song "Let Your Love Flow".[citation needed]
Document 8: A cappella: Barbershop music is one of several uniquely American art forms. The earliest reports of this style of a cappella music involved African Americans. The earliest documented quartets all began in barbershops. In 1938, the first formal men's barbershop organization was formed, known as the Society for the Preservation and Encouragement of Barber Shop Quartet Singing in America (S.P.E.B.S.Q.S.A), and in 2004 rebranded itself and officially changed its public name to the Barbershop Harmony Society (BHS). Today the BHS has over 22,000 members in approximately 800 chapters across the United States, and the barbershop style has spread around the world with organizations in many other countries. The Barbershop Harmony Society provides a highly organized competition structure for a cappella quartets and choruses singing in the barbershop style.
Document 9: Hurricane Maria: Hurricane Maria was regarded as the worst natural disaster on record in Dominica and Puerto Rico. The tenth-most intense Atlantic hurricane on record and the most intense tropical cyclone worldwide of 2017, Maria was the thirteenth named storm, eighth consecutive hurricane, fourth major hurricane, second Category 5 hurricane, and the deadliest storm of the hyperactive 2017 Atlantic hurricane season. At its peak, the hurricane caused catastrophic damage and numerous fatalities across the northeastern Caribbean, compounding recovery efforts in the areas of the Leeward Islands already struck by Hurricane Irma. Maria was the third consecutive major hurricane to threaten the Leeward Islands in two weeks, after Irma made landfall in several of the islands two weeks prior and Hurricane Jose passed dangerously close, bringing tropical storm force winds to Barbuda.
Document 10: A cappella: A cappella is gaining popularity among South Asians with the emergence of primarily Hindi-English College groups. The first South Asian a cappella group was Penn Masala, founded in 1996 at the University of Pennsylvania. Co-ed South Asian a cappella groups are also gaining in popularity. The first co-ed south Asian a cappella was Anokha, from the University of Maryland, formed in 2001. Also, Dil se, another co-ed a cappella from UC Berkeley, hosts the "Anahat" competition at the University of California, Berkeley annually. Maize Mirchi, the co-ed a cappella group from the University of Michigan hosts "Sa Re Ga Ma Pella", an annual South Asian a cappella invitational with various groups from the Midwest.
Document 11: Hurricane Maria: Hurricane Maria was regarded as the worst natural disaster on record in Dominica and Puerto Rico, and caused catastrophic damage and triggered a major humanitarian crisis in the latter. The tenth-most intense Atlantic hurricane on record and the most intense tropical cyclone worldwide thus far in 2017, Maria was the thirteenth named storm, eighth consecutive hurricane, fourth major hurricane, second Category 5 hurricane, and the deadliest storm of the hyperactive 2017 Atlantic hurricane season. At its peak, the hurricane caused catastrophic damage and numerous fatalities across the northeastern Caribbean, compounding recovery efforts in the areas of the Leeward Islands already struck by Hurricane Irma just two weeks prior. Maria was the third consecutive major hurricane to threaten the Leeward Islands in two weeks, after Irma made landfall in several of the islands two weeks prior and Hurricane Jose passed dangerously close, bringing tropical storm force winds to Barbuda.
Document 12: A cappella: Increased interest in modern a cappella (particularly collegiate a cappella) can be seen in the growth of awards such as the Contemporary A Cappella Recording Awards (overseen by the Contemporary A Cappella Society) and competitions such as the International Championship of Collegiate A Cappella for college groups and the Harmony Sweepstakes for all groups. In December 2009, a new television competition series called The Sing-Off aired on NBC. The show featured eight a cappella groups from the United States and Puerto Rico vying for the prize of $100,000 and a recording contract with Epic Records/Sony Music. The show was judged by Ben Folds, Shawn Stockman, and Nicole Scherzinger and was won by an all-male group from Puerto Rico called Nota. The show returned for a second and third season, won by Committed and Pentatonix, respectively.
Document 13: Hurricane Maria: The hurricane made its closest approach to St. Croix around 05: 00 UTC on September 20, passing within 20 mi (30 km) of the island; the storm's outer eyewall lashed the island while the more violent inner eye remained offshore. Hours later, around 08: 00 UTC, the outer eyewall struck Vieques, an island off the eastern coast of Puerto Rico. By this time, the outer eye became dominant as the inner one decayed, and the eyewall replacement cycle caused Maria to weaken to Category 4 strength. Maria made landfall just south of Yabucoa, Puerto Rico, around 10: 15 UTC with sustained winds of 155 mph (250 km / h), making it the strongest to hit the island since the 1928 San Felipe Segundo hurricane. Maria maintained a general west - northwest course across Puerto Rico, emerging over the Atlantic Ocean shortly before 18: 00 UTC. Interaction with the mountainous terrain resulted in substantial weakening; sustained winds fell to 110 mph (175 km / h) and the central pressure rose to 957 mbars (hPa; 28.26 inHg). With favorable environmental conditions, Maria steadily reorganized as it moved away from Puerto Rico. A large eye, 45 mi (75 km) wide, developed with deep convection blossoming around it. Early on September 21, the system regained Category 3 intensity.
Document 14: Grammy Award for Best Contemporary Performance by a Chorus: The Grammy Award for Best Contemporary Performance by a Chorus was awarded in 1969 (as Best Contemporary Pop Performance, Chorus) and in 1970. In some years, the Grammy Award for Best Pop Performance by a Duo or Group with Vocal also included performances by a chorus.
Document 15: Hurricane Sandy: After Sandy exited Cuba, the structure became disorganized, and it turned to the north - northwest over the Bahamas. By October 27, Sandy was no longer fully tropical, and despite strong shear, it maintained convection due to influence from an approaching trough; the same trough turned the hurricane to the northeast. After briefly weakening to a tropical storm, Sandy re-intensified into a hurricane, and on October 28 an eye began redeveloping. The storm moved around an upper - level low over the eastern United States and also to the southwest of a ridge over Atlantic Canada, turning it to the northwest. Sandy briefly re-intensified to Category 2 intensity on the morning of October 29, around which time it had a wind diameter of over 1,150 miles (1,850 km), and a central pressure of 943 mb, which set records for many cities across the Northeastern United States for the lowest pressures ever observed. The convection diminished while the hurricane accelerated toward the New Jersey coast, and the hurricane was no longer tropical by 2100 UTC on October 29. About 2 / hours later, Sandy made landfall near Brigantine, New Jersey, with winds of 80 mph (130 km / h). During the next four days, Sandy's remnants drifted northward and then northeastward over Ontario, before merging with another low pressure area over Eastern Canada on November 2.
ground_truth: September 20
sub_queries: In The Sing-Off, where did the groups not from the United States come from? Answer: Puerto Rico
when did hurricane maria make landfall in Puerto Rico Answer: September 20