Question: Were Paul Day and Mark Rankin both lead vocalists? 

Context articles: Mark Rankin (record engineer)
Paul Day (musician)
Paul Day (sculptor)
Mark Rankin
Mark Herring
George VI and Queen Elizabeth Memorial
One More Day (New Edition song)
Iraq and Afghanistan Memorial
Oh Mother
Chase Parker

Mark Rankin is a Grammy-winning British record and mixing engineer and music producer, who began his career in 2004 as a house engineer at The Exchange studios.
 He is a frequent collaborator of music producer Paul Epworth.
 Rankin's credits include critically acclaimed albums by Adele, Queens of the Stone Age, Foster the People, Florence and the Machine and Bloc Party.
Paul Mario Day (born 19 April 1956, Whitechapel, East London) is a British singer who is well-known as the original lead vocalist of Iron Maiden from 1975 to 1976.
Paul Day (born 1967) is a British sculptor.
 His high-relief sculptures in terracotta, resin, and bronze have been exhibited widely in Europe and his work is known for its unusual approach to perspective.
Mark Rankin was lead vocalist with Scottish rock band Gun, who were best known for their cover of "Word Up!
", originally by Cameo.
 The single was taken from the album "Swagger", and was released in 1994.
 Other singles were "Better Days", "Taking on the World" and "Steal Your Fire".
Mark Rankin Herring (born September 25, 1961) is an American lawyer serving as the 47th and current Attorney General of Virginia.
 He is a member of the Democratic Party.
 Previously, he served in the Senate of Virginia since a 2006 special election.
 He represented the 33rd district, made up of parts of Fairfax and Loudoun counties.
The George VI and Queen Elizabeth Memorial, situated between The Mall and Carlton Gardens in central London, is a memorial to King George VI and his consort, Queen Elizabeth The Queen Mother.
 Completed in its present form in 2009, the memorial incorporates an earlier, Grade II-listed statue of George VI by William McMillan, unveiled by his daughter Queen Elizabeth II in 1955.
 The reconfigured memorial, which includes a statue of the Queen Mother by Philip Jackson, relief sculpture by Paul Day and an architectural setting by Donald Buttress and Donald Insall, was unveiled by Elizabeth II in 2009.
"One More Day" is the fifth and final single from the "Home Again" album.
 It was released in the US with a B-side featuring a Darkchild remix to "Something About You".
 Ricky Bell and Ralph Tresvant were the lead vocalists.
 All six members were featured as background vocalists.
The Iraq and Afghanistan Memorial is a war memorial in London, England, commemorating British citizens who participated in the Gulf War, the Afghanistan War and the Iraq War in the period from 1990 to 2015, both military and civilian, including 682 who were killed.
 A work by the sculptor Paul Day, the memorial is situated in Victoria Embankment Gardens, between the River Thames and the headquarters of the Ministry of Defence, and near to monuments commemorating the Second World War and the Korean War.
"Oh Mother" is a song recorded by American singer Christina Aguilera for her fifth studio album, "Back to Basics" (2006).
 The song was released on November 23, 2007 by RCA Records as the fourth and final single from the album in European territories, while "Slow Down Baby" was serviced as the final single in Oceania.
 It was written by Aguilera, Derryck Thornton, Mark Rankin, Liz Thornton, Christophe Barratier, Bruno Coulais and Kara DioGuardi.
 Production was done by Big Tank and Q, with L Boggie credited as co-producer and Aguilera serviced as additional producer.
Chase Parker (born April 22, 1994) is an American child actor who was born in San Bernardino County, California.
 He is the grandson of actress Eleanor Parker and nephew of Paul Day Clemens, Jr.
 Chase Parker started acting when he was only 2 years old, and his TV debut was for an Arby's commercial.
 Then, in 1998 he acted in his first TV show, "General Hospital" as a younger version of Nikolas Cassadine.
 In 1999, he played as Benjy Evans in "Sunset Beach" and guest starred in "7th Heaven" as a younger version of Matt.
 He finished at The Woodlands High School.