instruction:
In this task, you are given a paragraph (from a research paper) and your task is to classify each sentence of the paragraph (assume n sentence) into the following categories: Background, Purpose, Method, Finding/Contribution, or Other. Return the output in this format: 1 - category of sentence 1, 2 - category of sentence 2, ..., n - category of sentence n; where each number indicates the order of the sentence. The categories can be identified using the following questions: 
 Background: - Why is this problem important? - What relevant works have been done before? - What did the previous works miss? - What are the high-level research questions? - How might this help other researchers?
 Purpose: - What specific things do the researchers want to do? - What specific knowledge do the researchers want to know? - What specific hypothesis do the researchers want to test?
 Method: - How did the researchers do it or find it out? - What are the procedures and steps of this research?
 Finding/Contribution: - What did the researchers find out? Did the proposed methods work? - Did things behave as the researchers expected?
Other: put every text fragment that does not fit into any of the categories above here. Put a sentence here if its not in English, is not part of the article, contains numbers and dates, is a caption of a figure or a table, is a formatting error, or you are not sure about it.
question:
Design, synthesis and biological evaluation of a series of 5-chloropyridine ester-derived severe acute respiratory syndrome-coronavirus chymotrypsin-like protease inhibitors is described. Position of the carboxylate functionality is critical to potency. Inhibitor 10 with a 5-chloropyridinyl ester at position 4 of the indole ring is the most potent inhibitor with a SARS 3Clpro IC 50 value of 30 nM and antiviral EC 50 value of 6.9 μM. Molecular Docking studies have provided possible binding modes of these inhibitors.
answer:
1 - background, 2 - background, 3 - background, 4 - finding


question:
Patients of all ages were recruited to the study. The patients with agreed diagnosis (diagnosed patients; n=794) included more pediatric (≤18 years) than adult (>18 years) patients (445 patients [56%] vs 349 [44%]). The age distribution was relatively uniform for patients aged 20-80 years and peaked at <4 years of age for pediatric patients (Fig.  S2) . The observed age distribution for pediatric patients is consistent with that expected and represents the background distribution in the inpatient setting [4] (e.g., the emergency department [ED], pediatrics departments, and internal departments). Patients of both genders were recruited to the study. The patient population was balanced in respect to gender distribution (47% females, 53% males).
answer:
1 - method, 2 - method, 3 - method, 4 - other, 5 - finding, 6 - finding, 7 - finding, 8 - finding


question:
Virus replicate inside prokaryotic and eukaryotic cells. Outside cells, they exist as independent particles (i.e. virions) generally composed of a protein shell (sometimes covered with a lipid bilayer) that contains their genetic material made of RNA or DNA. Virus genome replication and transcription are catalyzed by virally encoded polymerases. Although all these enzymes show some homology and share structural features and their catalytic mechanism, they also have important differences that reflect diverse virus replication strategies.
answer:

1 - background, 2 - background, 3 - background, 4 - finding, 5 - finding