Complex sentence: D-lite Japan Dome Tour 2017 was the third Japanese tour and first dome tour by Daesung, making him the second member of Big Bang to tour Domes, after G-Dragon in 2013.
Split into simpler sentences: D-lite Japan Dome Tour 2017 was the third Japanese tour and first dome tour by Daesung. This marks the second member of Big Bang to tour Domes, the first was G-Dragon in 2013.