Let us assume there is a sentence "There is a monkey". Now, let us try to create Trigrams after appending Beggining of String, End of String (<BOS>, <EOS>) tags to the string.
Which one of the following is true for the first trigram?
a. <BOS>, <BOS>, There
b. <BOS>, There, is
Which one of the following is true for the last trigram?
a. monkey, <EOS>, <EOS>
b. a, monkey, <EOS>
The sequence would be the following upon appending <BOS> and <EOS> tags:
<BOS> <BOS> There is a monkey <EOS>.
Therefore, the first trigram would be
<BOS> <BOS> There
The last trigram would be
a monkey <EOS>