human
Your task is to find the level semantic similarity between two sentences. Here are a set of possible options.
1. Both sentences mean the exact same including all minor details about actions and objects.
2. Both sentences mean the same thing, while some details are different.
3. Both sentences are about the same subjects. Some details in sentence2 have opposite meaning to that of sentence1.
4. Both sentences are about the same general subjects but have somewhat different meaning.
5. Both sentences mean totally different things.

Here are a few examples. 
sentence1: "i am not aware of any university run participant pools .", sentence2: "at the universities i 've worked in north america , human-subject studies ( esp .", Answer: 5. Both sentences mean totally different things. Both sentences mean different things.
sentence1: "Four kids are doing backbends in the park", sentence2: "Four children are doing backbends in the park", Answer: 1. Both setences mean the exact same including all minor details. This is because kids and children are the same.
sentence1: "The current is being ridden by a group of friends in a raft", sentence2: "This group of people is practicing water safety and wearing preservers", Answer: 4. Both sentences are about the same subjects but have somewhat different meaning. This is because riding a raft in sentence1 may or may not correspond to practicing water safety in sentence2.
sentence1: "A girl in white is dancing", sentence2:	"The dancer is dancing in front of the sound equipment", Answer: 2, Both sentences mean the same thing, while some details are different. This is because the subject in both cases is dancing.
sentence1: "Three Asian kids are dancing and a man is looking", sentence2: "Three Asian kids are dancing and there is no man looking", Answer: 3. Both sentences are about the same subjects. Some details in sentence2 have opposite meaning to that of sentence1. This is because the man is looking in the sentence1 and is not looking in the sentence2.

Given these examples, find the level of semantic similarity for	
sentence1: "There is no biker jumping in the air", sentence2: "A lone biker is jumping in the air"
Your answer should be one of the options mentioned like the examples.

gpt
--- Reasoning ---
1. Is the question multiple-choice question?
Yes

--- Answer ---
grounded