"Lean on me"

This one stays on the Dm7 forever until falling into C for a bar and going back to top... so the C bit is at:
Lean on [C]me, baby [Dm7]child
...or...
Won't bring you [C]down, just lean on [Dm7]me


Solo at 1m34 takes off:

-----------------------------------------
-------10--------------------------------
----10----12-10-12--10----9----10--------
-12--------------------12---12----12-10--
-----------------------------------------
-----------------------------------------

...so that's using the Dm pentatonic, plus the note of 2nd (or call it ninth if you wish).