The Hammers must overturn a 2-1 deficit tonight to reach the final.
Bowen has been dubbed 'Arjen Bowen' by fans this season and he said: "It's a big nickname to be associated with.
"It's been strange - from eight years ago when I first played at Hereford to now be in the Europa League semi-final, I'm grateful.
"It's about showing what I'm about. This season it was about believing in my abilities and showing it week in, week out with goals and assists."
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