Original sentence: According to the legend, the lyrics are based on a tragic event Collins witnessed, usually a drowning (as in the song's lyrics), in which a man could have helped the victim (sometimes said to be Phil's Brother), but did not do so (an alternate version of the legend has the onlooker a murderer, intentionally drowning the victim, rather than a bystander)
Edited sentence: According to the legend, the lyrics are based on a tragic event Collins witnessed, usually a drowning (as in the song's lyrics), in which a man could have helped the victim (sometimes said to be Phil's brother), but did not do so.An alternate version of the legend has the onlooker a murderer, intentionally drowning the victim, rather than a bystander