Auction
1♠ - (3♠) - 4♥ - (4♠)
Pass - (Pass) - 4NT - (Pass)
5♦
1♠ was MOSCITO, showing and unbalanced hand with 4+ Diamonds and ~9-14 HCP
Typically opener holds either 6 Diamonds or a two suited hand with the minors...
The rest of the auction is "natural"
Free made a good choice in bidding 5!D. which rolled home for a 7.3 IMP pick-up.
[5♥ can be set on a club lead]

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