You will be given a definition of a task first, then some input of the task.
In this task, you are given an abstract of article. Your task is to generate label "True" if abstract is structured, otherwise generate "False". A structured abstract is composed of a topic sentence (or key sentence), relevant supporting sentences, and a closing (or transition) sentence. This structure is key to keeping your abstract focused on the main idea and creating a clear and concise image.

Ignorance of the true length of the DNA molecules in the chromosomes of higher organisms has always been a major obstacle to understanding chromosome structure. Consequently, attempts have been made, usually with the aid of electron microscopy, to estimate the size of DNA in higher organisms. Solari (1) has reported the longest such DNA measured before now-a DNA fiber from a sea urchin sperm at least 93 , long.
Output:
False