Complex sentence: Joe Capilano (1850-1910), was a leader of the Sḵwxwú7mesh (Squamish), who called him "Sa7plek" (Sahp-luk).
Split into simpler sentences: Joe Capilano (1850-1910), was a leader of the Sḵwxwú7mesh (Squamish). To his people he was known as "Sa7plek" (Sahp-luk).