Table: type 23 frigate
[['name', 'pennant number', 'laid down', 'launched', 'date of commission', 'homeport (as of july 2013)', 'planned decommission (as announced in 2009)'], ['norfolk', 'f230', '14 december 1985', '10 july 1987', '1 june 1990', 'sold to chile', 'n / a'], ['argyll', 'f231', '20 march 1987', '8 april 1989', '31 may 1991', 'devonport', '2023'], ['lancaster', 'f229', '18 december 1987', '24 may 1990', '1 may 1992', 'portsmouth', '2024'], ['marlborough', 'f223', '22 october 1987', '21 january 1989', '14 june 1991', 'sold to chile', 'n / a'], ['iron duke', 'f234', '12 december 1988', '2 march 1991', '20 may 1993', 'portsmouth', '2025'], ['monmouth', 'f235', '1 june 1989', '23 november 1991', '24 september 1993', 'devonport', '2026'], ['montrose', 'f236', '1 november 1989', '31 july 1992', '2 june 1994', 'devonport', '2027'], ['westminster', 'f237', '18 january 1991', '4 february 1992', '13 may 1994', 'portsmouth', '2028'], ['northumberland', 'f238', '4 april 1991', '4 april 1992', '29 november 1994', 'devonport', '2029'], ['richmond', 'f239', '16 february 1992', '6 april 1993', '22 june 1995', 'portsmouth', '2030'], ['somerset', 'f82', '12 october 1992', '25 june 1994', '20 september 1996', 'devonport', '2031'], ['grafton', 'f80', '13 may 1993', '5 november 1994', '29 may 1997', 'sold to chile', 'n / a'], ['sutherland', 'f81', '14 october 1993', '9 march 1996', '4 july 1997', 'devonport', '2033'], ['kent', 'f78', '16 april 1997', '27 may 1998', '8 june 2000', 'portsmouth', '2034'], ['portland', 'f79', '14 january 1998', '15 may 1999', '3 may 2001', 'devonport', '2035'], ['st albans', 'f83', '18 april 1999', '6 may 2000', '6 june 2002', 'portsmouth', '2036']]
Statement: more ship have the Homeport Of Devonport than have Portsmouth as their Homeport (7 versus 6)
Statement: 3 of the 16 ship have been Sold To Chile
Statement: 2 of the ship Sold To Chile were commissioned before 1990
Statement: 7 of the 16 ship were Laid Down in the 1980s
Statement: only 1 of the 16 ship was Launched in the 21st century