 Pym originally operated as Ant-Man and as an agent of S.H.I.E.L.D. decades earlier until his wife Janet van Dyne  shrunk down to the Quantum Realm during one of their missions, though he initially believed she perished.
<fluency>  Pym originally operated as Ant-Man and as an agent of S.H.I.E.L.D. decades earlier until his wife Janet van Dyne  shrunk down to the Quantum Realm during one of their missions, though he initially believed she perished.
 Pym originally operated as Ant-Man and an agent of S.H.I.E.L.D. decades earlier until his wife Janet van Dyne shrunk down to the Quantum Realm during one of their missions, though he initially believed she perished.