Mr Physicson has been programming some nuclear reactor results filtering program. So, when he returned home tonight, he incorporated a bit of this new knowledge when he was singing to his son:
x=person:property(("small sized"&&"black skin")|("small sized"&&"red skin")|"good deeds") set x_count=10 x_count x gathered on the evening to socially sustain themselves A blockage of the upper airway resulted in x_count-- x_count x gave prolonged continuance to the aforementioned gathering The consequent rest needed was overwhelming in one case so x_count-- x_count x went on an excursion to southwest United Kingdom The scenary seduced a traveller, causing no return, so x_count-- x_count x were splitting wooden cylinders with raw tools One had its target replaced with themselves, so x_count-- x_count x were messing with an Anthophila colony One of its members reacted defensively, and thus x_count-- (one verse reducted, because the OP cannot figure its meaning with certainty) x_count x went on an excursion to a large water body The deceptive fish grabbed one so x_count-- x_count x went on an excursion to the show of various fauna An Ursidae grabbed one so x_count-- x_count x were enjoying the topic star's gaze One overdid it so x_count-- Since x_count==1, the last x was alone It suicided by asphyxiation so x_count--
At this point, the young kid was fast asleep. Mr Physicson smiled. He then recalled the associated, marvellous mystery novel he read back then.
What was he singing? What did he recall?