Venture capitalists want a piece of just about anything involving artificial intelligence, whether it’s computers learning to drive or helping people shop for clothing. The latest to get a sizable investment is a startup looking to use AI to improve people’s grammar. General Catalyst, a Silicon Valley venture firm, said Monday that it led a $110 million investment in Grammarly Inc. The San Francisco startup makes software that underlines awkward words and phrases in the user’s writing and makes suggestions, similar to a feature in Microsoft Word. Grammarly promises to do more than fix spelling and syntax. It said the...