WARNING : Input text is expected to have at least 10 sentences.

[harsh1711]

I am getting following warning:

2018-02-01 14:56:38,268 : WARNING : Input text is expected to have at least 10 sentences.
2018-02-01 14:56:38,272 : INFO : adding document #0 to Dictionary(0 unique tokens: [])
2018-02-01 14:56:38,276 : INFO : built Dictionary(52 unique tokens: ['clearli', 'adult', 'chang', 'member', 'visit']...) from 4 documents (total 70 corpus positions)
2018-02-01 14:56:38,280 : WARNING : Input corpus is expected to have at least 10 documents.
2018-02-01 14:56:38,288 : WARNING : Couldn't get relevant sentences.

but I am not getting an empty summary as an output as shown below:

Summary:
[]

Can you please help me.
Thanks in Advance!!