Question: Which station is located directly below the arena that hosted the 2011 Royal Rumble?

Context paragraphs:
Royal Rumble (2007): Royal Rumble (2007) was the twentieth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE).  It took place on January 28, 2007, at the AT&T Center in San Antonio, Texas and featured talent from the Raw, SmackDown!  and ECW brands.  This marked the first time that the new ECW brand participated in the Royal Rumble match.  As has been customary since 1993, the Royal Rumble match winner received a match at that year's WrestleMania, (in this instance: WrestleMania 23) for his choice at either the WWE Championship, the World Heavyweight Championship or the ECW World Championship.

Royal Rumble (1999): Royal Rumble (1999) (also known as Royal Rumble: No Chance in Hell) was the twelfth annual Royal Rumble professional wrestling pay-per-view event produced by the World Wrestling Federation (WWF).  It took place on January 24, 1999, at the Arrowhead Pond of Anaheim in Anaheim, California.  The tagline and subtitle of the event was taken from a promise by Mr. McMahon that the first entrant in the Royal Rumble, Stone Cold Steve Austin, had "no chance in hell" of winning the match.  The theme song for the event, based on the phrase, would go on to become the entrance music for McMahon's stable The Corporation and later, just McMahon himself, which he uses to this day.

Royal Rumble (2016): Royal Rumble (2016) was a professional wrestling pay-per-view (PPV) event, produced by WWE.  It took place on January 24, 2016, at the Amway Center in Orlando, Florida.  It was the 29th event in the Royal Rumble chronology.  The event also was the fifth Royal Rumble pay-per-view to be held in the state of Florida (1990, 1991, 1995, and 2006), the second (1990) to be held in Orlando, and the first pay-per-view event at the Amway Center.  The Royal Rumble match was the second that was contested for the WWE World Heavyweight Championship (after the 1992 Rumble), and the first match in which the champion defended his title in the Rumble match.

Royal Rumble (2011): Royal Rumble (2011) was the twenty-fourth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE).  It took place on January 30, 2011 at the TD Garden in Boston, Massachusetts, and featured talent from the Raw and SmackDown brands.  As has been customary since 1993, the Royal Rumble match winner received a match at that year's WrestleMania (in this instance: WrestleMania XXVII) for his choice at either the WWE Championship or the World Heavyweight Championship.

TD Garden: TD Garden, often called Boston Garden and "The Garden", is a multi-purpose arena in Boston, Massachusetts.  It is named after its sponsor, TD Bank, a subsidiary of Canada's Toronto-Dominion Bank.  It opened in 1995 as a replacement for the original Boston Garden and has been known as Shawmut Center, FleetCenter, and TD Banknorth Garden.  The arena is located directly above the MBTA's North Station.

Royal Rumble (1993): Royal Rumble (1993) was the sixth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by the World Wrestling Federation (WWF).  It took place on January 24, 1993 at the ARCO Arena in Sacramento, California.  The main event was a Royal Rumble match, a battle royal in which two wrestlers started the match in the ring; every two minutes, another wrestler joined.  In total, thirty wrestlers competed to eliminate their competitors by throwing them over the top rope of the wrestling ring onto the arena floor.  Yokozuna won the match and was awarded an opportunity to wrestle for the WWF World Heavyweight Championship at WrestleMania IX.  Bret Hart also retained his WWF World Heavyweight Championship against Razor Ramon, and Shawn Michaels successfully defended his WWF Intercontinental Championship against Marty Jannetty.

Royal Rumble (2003): Royal Rumble (2003) was the sixteenth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE).  It took place on January 19, 2003, at the Fleet Center in Boston, Massachusetts, was the first Royal Rumble produced under the WWE name and employed talent from the Raw and SmackDown!  brands.  As has been customary since 1993, the Royal Rumble match winner received a match at that year's WrestleMania, (in this instance: WrestleMania XIX) for his brand's World title, either the WWE Championship or the World Heavyweight Championship.

Royal Rumble (2002): Royal Rumble (2002) was the fifteenth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by the World Wrestling Federation (WWF).  It took place on January 20, 2002, at the Philips Arena in Atlanta, Georgia, and was the final Royal Rumble produced under the WWF name.

Royal Rumble (2006): Royal Rumble (2006) was the nineteenth annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE).  It was presented by Sony Computer Entertainment's "The Con".  It took place on January 29, 2006, in the American Airlines Arena in Miami, Florida and featured talent from the Raw and SmackDown!  brands.  As has been customary since 1993, the Royal Rumble match winner received a match at that year's WrestleMania, (in this instance: WrestleMania 22) for his choice at either the WWE Championship or the World Heavyweight Championship.

Royal Rumble (2010): Royal Rumble (2010) was the twenty-third annual Royal Rumble professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE).  It took place on January 31, 2010, at the Philips Arena in Atlanta, Georgia and featured talent from the Raw, SmackDown, and ECW brands.  As has been customary since 1993, the Royal Rumble match winner received a match at that year's WrestleMania, (in this instance: WrestleMania XXVI) for his choice at either the WWE Championship, the World Heavyweight Championship, or the ECW Championship.

Supporting paragraphs: Royal Rumble (2011) TD Garden
Answer: MBTA's North Station