Premise: "A large group of people in a red raft wearing red life jackets on the river."
Hypothesis: "A large group of people are on the river."
Do we know that the hypothesis entailed by the premise?

yes
Explanation: A group is on the river regardless of what they are wearing..

Given the sentence "A lone leafless tree of about 25 feet stands in front of a construction site using blue mesh and a construction worker resting an arm on a traffic light pole." is it true that "A worker takes a break by a large tree."?

it is not possible to tell
Explanation: Just because its a large tree doesn't confirm if its lone or leafless..

Test for natural language inference.
Premise: "One man without a shirt and a man with a hat steering are in a small boat."
Hypothesis: "The man is punching the other man."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

no
Explanation: The man punching other can not be in a small boat..

Test for natural language inference.
Premise: "A man swings a golf club while the person to his left waves an arm."
Hypothesis: "A person plays tennis."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
no
Explanation: The man/person would not be swinging a golf club while playing tennis. A man is a person but a person is not necessarily a man..