What are the keywords in the following sentence? image titled pack for a week
image, title, week

What are the keywords in the following sentence? Someone grabs a grenade from an open crate and hurls it into enemy ranks, exploding several hydra soldiers.
crate, explode, hurl, rank, soldier

What are the keywords in the following sentence? people with burning incense praying for lucky and happy inside tourist attraction .
burn, incense, pray

What are the keywords in the following sentence? The crowds is in the middle of the town square.
crowd, middle, square