What type of vegetarian needs to do protein complementation?

There are many that say men need 30-40 grams of protein in one day. Rice provides 60+. I read one time that an elephant is a vegetarian and they grow fine. I eat meat myself but rest assured, there is enough protein in most unrefined vegetables to meet your needs. Legumes are one of the leaders. 100 grams of soy beans contains almost 40 grams of protein! Eat up!!