O: an observation or result
C: a conclusion
RO: a report of someone else's observation
RC: a report of someone else's conclusion
X: something else

A. Mary Had a Little Lamb

First two stanzas:

1. Mary had a little lamb,
2. whose fleece was white as snow.
3. And everywhere that Mary went, the lamb was sure to go.
    
4. It followed her to school one day
5. which was against the rules.
6. It made the children laugh and play, to see a lamb at school.

B. Winter et al (1987)

Winter RB, Morrissey L, Gauss P, Gold L, Hsu T, Karam J (1987).
Bacteriophage T4 regA protein binds to mRNAs and prevents translation initiation.
Proc Natl Acad Sci USA 84:7822-7826.

First paragraph of Results section:

1. Sentence 1, beginning Previous studies (24-27)...
2. Sentence 2, beginning Additional regA-regulated T4 genes...
3. Sentence 3, beginning To identify the...
4. Sentence 4, beginning Fig. 1 shows...
5. Sentence 5, beginning In one T4 genetic cluster...
6. Sentence 6, beginning T4 genes rpbA and 45...
7. Sentence 7, beginning Other work has shown...
8. Sentence 8, beginning Thus, the gene cluster diagrammed...