Question: Who was a member of the group Sistar, Alex Kapranos or Hyolyn?

Context paragraphs:
Sistar: Sistar (, often stylized as SISTAR) was a South Korean girl group formed in 2010 by Starship Entertainment.  The group consisted of Hyolyn, Bora, Soyou, and Dasom.  Their debut studio album "So Cool" was released on 9 August 2011.  Their second album, "Give It to Me," was released on 11 June 2013.  Their biggest hits include "So Cool", "Alone", "Touch My Body", "Loving U" and "Give It to Me".  Their fourth single, "So Cool," debuted at number one at "Billboard" Korea K-Pop Hot 100 singles chart.

Volume 1 (BNQT album): Volume 1 is the debut studio album by indie super-group BNQT, lead by Eric Pulido (Midlake) with Ben Bridwell (Band of Horses), Alex Kapranos (Franz Ferdinand), Fran Healy (Travis) and Jason Lytle (Grandaddy), backed by the other members of Midlake.  Each member wrote and sang on two tracks each.  It was released on 28 April 2017.

Hyolyn: Kim Hyo-jung (born January 11, 1991), better known by her stage name Hyolyn, is a South Korean singer-songwriter.  She is best known as a former member of South Korean girl group Sistar and their sub-unit Sistar19.

Hyolyn discography: The following is the discography of South Korean singer Hyolyn of the dance-pop girl group Sistar.  She has released one studio album, one extended play, and fourteen singles.  As of December 2016, Hyolyn has sold over 12 million digital records.

Bullet (Franz Ferdinand song): "Bullet" is a song by Scottish indie rock band Franz Ferdinand.  It was released as the fourth single from the band's fourth studio album, "Right Thoughts, Right Words, Right Action" on 17 January 2014.  The song was written by Alex Kapranos, Nick McCarthy, and Alexander Ragnew, recorded during 2013, and produced by Kapranos.  The music video for the song was released on 18 November 2013, was directed by Andy Knowles, and was posted on the band's Vevo channel on YouTube.

Evil Eye (Franz Ferdinand song): "Evil Eye" is a song by Scottish indie rock band Franz Ferdinand.  It was released as the third single from the band's fourth studio album, "Right Thoughts, Right Words, Right Action", on 28 October 2013.  The song was written by Alex Kapranos and Nick McCarthy, recorded during 2013, and produced by Kapranos and Todd Terje.

Sistar19: Sistar19 () was the first official sub-group of South Korean girl group Sistar and was formed by Starship Entertainment in 2011.  The sub-group is composed of Hyolyn and Bora.  Their debut single "Ma Boy" was released in May 2011.  Their second and most successful single "Gone Not Around Any Longer" was released in 2013, with an EP with the same title.  The sub-group disbanded the 4 June 2017 alongside the official group.

The Karelia: The Karelia were a Scottish band formed by current Franz Ferdinand frontman Alex Kapranos, known at the time as Alex Huntley, in 1996.

Stand on the Horizon: "Stand on the Horizon" is a song by Scottish indie rock band Franz Ferdinand.  It was released as the sixth single from the band's fourth studio album, "Right Thoughts, Right Words, Right Action", on 28 July 2014.  The song was written by Alex Kapranos and Nick McCarthy, recorded during 2013, and produced by Kapranos and Norwegian DJ Todd Terje.  The music video for the song was released on 3 August 2014, was directed by Karan Kandhari, and was posted on the band's Vevo channel on YouTube.

Alex Kapranos: Alexander Paul Kapranos Huntley (born 20 March 1972) is a Scottish musician, singer, songwriter, record producer, and author.  He is best known as the lead singer and guitarist of Scottish rock band Franz Ferdinand.

Supporting paragraphs: Alex Kapranos Hyolyn
Answer: Hyolyn