Who was van goghs mentor?

What are the cameras called where you take a picture and the picture comes out of the camera? What does Hg stand for on a light bulb? What is the normal pulse rate for a 15 year old male? What part of speech is fret? What does Venice mean? Is 100sys 69 DIA and 71 heart rate low? What Objects start with the letter k? What style did John Sloan use? Which cartoon character hates trees being cut down or uprooted and starts crying? Why was the teaming up of Athens and Sparta a turning point for both Greece and Persia? How do you check for bad valves? What can you do with scrap beads? Is it china or japan the pioneer of art of paper-cut? What does it take the earth one week to do? How much is the Franklin Mint Norman Rockwell Limited Ed. Classic American Gumball Machine? When you sew in a hair weave what do you do with the ends of the braids and do you leave the sides of the head out? What condition of a body be in a state of equillibrium? What part of speech is different? Can life exist below the earth's surface? What does MAD magazine stands for?