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http://en.wikipedia.org/wiki/Embryoid_body :

Embryoid bodies (EBs) are three-dimensional aggregates of pluripotent stem cells. The pluripotent cell types that comprise embryoid bodies include embryonic stem cells (ESCs) derived from the blastocyst stage of embryos from mouse (mESC),[1][2] primate,[3] and human (hESC)[4] sources.

From SOLS lookup against the selected ontologies:

blood island (ZFA:0000094) -is_a- portion of tissue (ZFA:0001477)

blood island (XAO:0000067) -part_of- hematological system (XAO:0000122) -is_a- anatomical system (XAO:0003002) -is_a- anatomical group (XAO:0003001)

blood island (TAO:0000094) -part_of- intermediate cell mass of mesoderm (TAO:0000033) -part_of- hematopoietic system (TAO:0005023) -is_a- anatomical system (TAO:0001439) -is_a- anatomical group (TAO:0001512)

blood island (UBERON:0003061) -is_a- developing anatomical structure (UBERON:0005423)

caudal hematopoietic tissue (ZFA:0000094) -synonym_exact- blood island (ZFA:0000094)

see also http://en.wikipedia.org/wiki/Blood_island_of_umbilical_vesicle

17 lines in AnEM-1.0.4/standoff/PMC-1697817-sec-02.txt contain stuff like the following:

MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacuWGqbaugaacamaaBaaaleaacqaIXaqmaeqaaOGaeiikaGccciGaf8xWdiNbaSaacqGGPaqkaaa@3295@ = exp(ipilambdaz0rho2)circ(rho/rhoMAX)

This traces back to a failure of the PMC NXML-to-text processing tools in https://github.com/spyysalo/bionlp_st_2011_supporting to process MathType. A quick check suggests this is relatively rare (occurs in one in a random sample of 1000 PMC OA docs), but should be resolved anyway.

The relevant bits of the source XML look like so

<inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1" name="1475-925X-5-63-i1" overflow="scroll"><mml:semantics definitionURL="" encoding=""><mml:mrow><mml:msub><mml:mover accent="true"><mml:mi>P</mml:mi><mml:mo>&#x002dc;</mml:mo></mml:mover><mml:mn>1</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mover accent="true"><mml:mi>&#x003c1;</mml:mi><mml:mo>&#x02192;</mml:mo></mml:mover><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:annotation encoding="MathType-MTEF">
 MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacuWGqbaugaacamaaBaaaleaacqaIXaqmaeqaaOGaeiikaGccciGaf8xWdiNbaSaacqGGPaqkaaa@3295@</mml:annotation></mml:semantics></mml:math></inline-formula>

so, as there is a MathML specification in addition to the MathType "annotation", it should be possible to just wipe the MathType and go from the MathML in the conversion in at least this case.

In 18646688, the following appear:

endostatin gene transfer (sentence 1)

and

Endostatin gene therapy (sentence 15)

where "[Ee]ndostatin" is marked Instrument in the former and Theme in the latter case.

See http://en.wikipedia.org/wiki/Flow_cytometry

18824876 title has

inhibition of ovarian cancer growth and prolonged survival by transfection

annotated with the (partial) interpretation "inhibition of ... survival", which seems unlikely in context.