Domain: Healthcare — Pathology
Target concept: Tumor (benign tumor cell morphology)

Video generation prompt: A benign tumor tissue section is placed on the experimental table and observed under the optical microscope for cell morphology.

Evaluation guide:
(i) Target concept: Microscopic identification of benign tumor based solely on static, unlabeled, histologic morphology.
Minimum mechanism: Light must pass through a stained, thin, solid tissue section; microscope optics must project a magnified, in-focus 2D projection of cellular architecture; observer must see sufficient field detail to assess nuclear uniformity, mitotic activity, and tissue organization.
(ii)Storyline: [Phase 1: Setup] Table appears → tissue section is placed centrally → microscope is positioned adjacent (same plane, fixed viewpoint). [Phase 2: Observation] Eyepiece view replaces wide shot (field is centered, stable, and in-focus) and reveals cellular layer with uniform nuclei and organized structure. [Phase 3: Confirmation] Entire visible field sustains benign morphology features continuously; no contradictory elements (e.g., invasive fronts, necrosis, dysplasia) enter frame; viewpoint remains static and unobstructed throughout.

Manual:
Experimental Procedure
1. Place a benign tumor tissue section on the experimental table.
2. Position optical microscope adjacent to the section.
3. Observe the tissue section under the microscope eyepiece.
Observation of Experimental Phenomena
Uniform cell size and shape, round nuclei with fine chromatin, no abnormal mitoses, and preserved tissue architecture (e.g., circumscribed nests or glands).
Summary of Experimental Principles
Benign tumor cells exhibit cytologic uniformity, low nuclear-to-cytoplasmic ratio, absence of atypia, and non-invasive growth pattern with intact basement membrane and pushing borders.

Prompt Grounding rubric:
level_1: No benign tumor tissue section, optical microscope, or experimental table is visible anywhere in the frame, and no placement or observation action of any kind is depicted.
level_2: Only one of the three required elements is recognizable (for example, a bare table with nothing on it, an optical microscope alone with no section nearby, or an unidentified slide-like object with no table or microscope in view); no scene shows the section being set down, and no close-up/eyepiece view of any tissue ever appears.
level_3: The benign tumor tissue section, the optical microscope, and the experimental table are all visible together, and the section is shown being placed on the table with the microscope positioned adjacent to it before any observation begins, but the camera never cuts to a close-up or eyepiece-style view, so no magnified field of the tissue is ever shown.
level_4: The tissue section is placed on the table and the microscope sits adjacent to it in a plausible working arrangement (section under or in line with the objective lens), matching the correct setup order; the camera then cuts to a close-up/eyepiece-style view of the section, but that view is off-center, partly cropped at the frame edge, briefly out of focus, or held too briefly to show a full, settled field of the tissue.
level_5: The tissue section is placed on the table and the microscope sits adjacent to it in a plausible working arrangement, matching the correct setup order; the camera then cuts to a close-up/eyepiece-style view that is centered, fully in focus, fills the frame with the tissue field, and holds that framing without cropping, drifting off-center, or cutting away early for the remainder of the shot.

Scientific and Causal Correctness rubric:
level_1: The cells shown in the eyepiece field display unambiguous malignant features: for example, sharply irregular nuclear sizes and shapes (pleomorphism), several dividing cells with abnormal division figures, or clusters of cells pushing into surrounding tissue; or the field shows no real cells at all (geometric patterns, text, or noise standing in for tissue).
level_2: Cells are present in the eyepiece field but no consistent nuclear or tissue pattern can be made out (a formless blur of shapes), or the field mixes contradictory signals (e.g., cells of uniform size sitting next to darkly-clumped, irregular nuclei and several dividing cells), or the 'tissue' is actually an artifact such as ink spots, printed grid lines, or blocky pixelation standing in for cells.
level_3: The eyepiece field shows a population of cells that are uniform in size and shape, with round-to-oval nuclei and evenly-distributed (not clumped or dark) chromatin, and no cell caught in the act of dividing (matching benign morphology), but the cells are scattered without any recognizable grouping into glands, lobules, or nests, and no boundary between the tissue and surrounding stroma is visible.
level_4: The eyepiece field shows cells that are uniform in size and shape, round nuclei with fine, even chromatin, no dividing cells, and no atypical cell shapes anywhere, and the cells are clearly organized into an intact structure (e.g., recognizable glandular units or tightly nested cell groups with a continuous surrounding membrane), but nothing in the shot (no juxtaposed comparison, caption, or scale marking) visually signals that this organized, uniform pattern is specifically benign.
level_5: The eyepiece field shows cells that are uniform in size and shape, round nuclei with fine even chromatin, no dividing cells, and no atypical shapes anywhere, and in addition the tissue forms a clearly bounded, cohesive nodule with smooth pushing edges and no strands of cells breaking into the surrounding stroma; the visual pattern alone, with no captions or side-by-side references, is enough for a viewer familiar with histology to call the tissue benign.

Spatiotemporal Consistency rubric:
level_1: The tissue section appears mid-air and snaps directly onto the table with no placement motion, or the section vanishes from one spot on the table and reappears in a different spot between shots; the microscope's position relative to the table changes discontinuously from one frame to the next; the eyepiece field's illumination flashes from bright to dark (or the reverse) within a single frame with no cause; or the eyepiece view cuts in and out erratically or the shape of the field it shows changes structurally from frame to frame.
level_2: One clear spatiotemporal break occurs: the tissue section is shown placed on the table but is then absent from the table in a later frame before the eyepiece cut; or the microscope's focus jumps from fully blurred to fully sharp within a single frame with no gradual racking; or the brightness of the eyepiece field's illumination changes abruptly between two adjacent frames with no dimming/brightening transition; or the eyepiece view suddenly rotates or pans sideways even though the shot is framed as a fixed, static observation.
level_3: The tissue section stays in the same position on the table relative to the microscope from placement through observation, and the stain color and illumination brightness of the eyepiece field stay visually the same hue and brightness across the observation phase, and the placement and focus-adjustment motions are each smooth rather than instantaneous, but a viewer can notice a brief soft-focus moment or a faint flicker at the exact instant the shot cuts from the wide view to the eyepiece view, after which the view settles and holds centered.
level_4: Same positional stability, and the same stain-color and illumination-brightness consistency as level 3, and the cut from the wide shot to the eyepiece view shows no flicker or soft-focus moment at all, but one isolated frame shows an inconsistency unrelated to the main motion, such as a fleeting glare or reflection on the lens, or a speck of dust in the field that is not present in the frames immediately before or after.
level_5: The tissue section never changes position on the table, the microscope's position and orientation relative to the table never change, the stain color and illumination brightness of the eyepiece field are identical throughout the entire observation phase, the cut to the eyepiece view is clean with no flicker or soft-focus moment, and no transient artifact (glare, dust speck, or frame-to-frame flutter) appears at any point in the shot.