Analysts impressed with progress at Tesla's flagship factory; co spent $1.6B on upgrades in '15 https://t.co/SABxCSn8cd by @tsrandall $TSLA
### Instruction: What is the sentiment of this news? Please choose an answer from {negative/neutral/positive}
### Input: Analysts impressed with progress at Tesla's flagship factory; co spent $1.6B on upgrades in '15 https://t.co/SABxCSn8cd by @tsrandall $TSLA
### Response: positive