Joe Knox was hospitalized, recovered, and still surfs in Imperial Beach. Like most, he takes precautions before entering the water. He'll check the county's water quality and the Tijuana River's flow online. He's also learned to read the ocean for signs of pollution such as discoloration on the water's surface, the consistency and color of the sea foam, and strange odors in the ocean breeze.
Most surfers take precautions before entering the water.
Actually, the text says "Like most, he takes precautions before entering the water." Although he is a surfer, "most" appears to refer to most people in general, not most surfers specifically.
( z1 precaution :ARG0 ( z2 person :ARG0-of ( z3 surf ) :quant ( z4 most ) ) :time ( z5 before :op ( z6 enter :ARG0 z2 :ARG1 ( z7 water ) ) ) )