Generate a correct and concise answer for the question based on the words in the context.

Context : Power Rangers S.P.D. is an American television series and the thirteenth season of the Power Rangers franchise, based on the Super Sentai series, Tokusou Sentai Dekaranger. 
Question : The Power Rangers S.P.D. is based upon what?
Tokusou Sentai Dekaranger

Context : L'Ile Mysterieuse / La Isla misteriosa y el capitán Nemo / Die Geheimnisvolle Insel (The Mysterious Island) is a 1973 European TV miniseries production (300 minutes) adapted from Jules Verne's novel L'Île mystérieuse. 
Question : Which is the basis of La Isla misteriosa y el capitán Nemo?
The Mysterious Island

Context : The Trethewey Mine is an abandoned silver mine in Cobalt, Ontario, Canada, located northwest of the Coniagas Mine near Sasaginaga Lake. 
Question : The product of Trethewey Mine is what?

silver